diff --git a/.gitignore b/.gitignore
index c00dc42..429d6ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -100,3 +100,5 @@ bower.json
 # Ignore Byebug command history file.
 .byebug_history
 
+db/*.sqlite3
+
diff --git a/.idea/.generators b/.idea/.generators
deleted file mode 100644
index aa3c1a6..0000000
--- a/.idea/.generators
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Settings><!--This file was automatically generated by Ruby plugin.
-You are allowed to: 
-1. Reorder generators
-2. Remove generators
-3. Add installed generators
-To add new installed generators automatically delete this file and reload the project.
---><GeneratorsGroup><Generator name="assets" /><Generator name="channel" /><Generator name="coffee:assets" /><Generator name="controller" /><Generator name="generator" /><Generator name="helper" /><Generator name="integration_test" /><Generator name="jbuilder" /><Generator name="job" /><Generator name="js:assets" /><Generator name="mailer" /><Generator name="migration" /><Generator name="model" /><Generator name="resource" /><Generator name="scaffold" /><Generator name="scaffold_controller" /><Generator name="task" /><Generator name="test_unit:generator" /><Generator name="test_unit:plugin" /></GeneratorsGroup></Settings>
diff --git a/.idea/.rakeTasks b/.idea/.rakeTasks
deleted file mode 100644
index 6cb4d5a..0000000
--- a/.idea/.rakeTasks
+++ /dev/null
@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Settings><!--This file was automatically generated by Ruby plugin.
-You are allowed to: 
-1. Remove rake task
-2. Add existing rake tasks
-To add existing rake tasks automatically delete this file and reload the project.
---><RakeGroup description="" fullCmd="" taksId="rake"><RakeTask description="List versions of all Rails frameworks and the environment" fullCmd="about" taksId="about" /><RakeGroup description="" fullCmd="" taksId="app"><RakeTask description="Applies the template supplied by LOCATION=(/path/to/template) or URL" fullCmd="app:template" taksId="template" /><RakeTask description="Update configs and some other initially generated files (or use just update:configs or update:bin)" fullCmd="app:update" taksId="update" /><RakeGroup description="" fullCmd="" taksId="templates"><RakeTask description="" fullCmd="app:templates:copy" taksId="copy" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="update"><RakeTask description="" fullCmd="app:update:bin" taksId="bin" /><RakeTask description="" fullCmd="app:update:configs" taksId="configs" /></RakeGroup></RakeGroup><RakeGroup description="" fullCmd="" taksId="assets"><RakeTask description="Remove old compiled assets" fullCmd="assets:clean[keep]" taksId="clean[keep]" /><RakeTask description="Remove compiled assets" fullCmd="assets:clobber" taksId="clobber" /><RakeTask description="Load asset compile environment" fullCmd="assets:environment" taksId="environment" /><RakeTask description="Compile all the assets named in config.assets.precompile" fullCmd="assets:precompile" taksId="precompile" /><RakeTask description="" fullCmd="assets:clean" taksId="clean" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="cache_digests"><RakeTask description="Lookup first-level dependencies for TEMPLATE (like messages/show or comments/_comment.html)" fullCmd="cache_digests:dependencies" taksId="dependencies" /><RakeTask description="Lookup nested dependencies for TEMPLATE (like messages/show or comments/_comment.html)" fullCmd="cache_digests:nested_dependencies" taksId="nested_dependencies" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="db"><RakeTask description="Creates the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:create:all to create all databases in the config). Without RAILS_ENV or when RAILS_ENV is development, it defaults to creating the development and test databases" fullCmd="db:create" taksId="create" /><RakeTask description="Drops the database from DATABASE_URL or config/database.yml for the current RAILS_ENV (use db:drop:all to drop all databases in the config). Without RAILS_ENV or when RAILS_ENV is development, it defaults to dropping the development and test databases" fullCmd="db:drop" taksId="drop" /><RakeGroup description="" fullCmd="" taksId="environment"><RakeTask description="Set the environment value for the database" fullCmd="db:environment:set" taksId="set" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="fixtures"><RakeTask description="Loads fixtures into the current environment's database" fullCmd="db:fixtures:load" taksId="load" /><RakeTask description="" fullCmd="db:fixtures:identify" taksId="identify" /></RakeGroup><RakeTask description="Migrate the database (options: VERSION=x, VERBOSE=false, SCOPE=blog)" fullCmd="db:migrate" taksId="migrate" /><RakeGroup description="" fullCmd="" taksId="migrate"><RakeTask description="Display status of migrations" fullCmd="db:migrate:status" taksId="status" /><RakeTask description="" fullCmd="db:migrate:down" taksId="down" /><RakeTask description="" fullCmd="db:migrate:redo" taksId="redo" /><RakeTask description="" fullCmd="db:migrate:reset" taksId="reset" /><RakeTask description="" fullCmd="db:migrate:up" taksId="up" /></RakeGroup><RakeTask description="Rolls the schema back to the previous version (specify steps w/ STEP=n)" fullCmd="db:rollback" taksId="rollback" /><RakeGroup description="" fullCmd="" taksId="schema"><RakeGroup description="" fullCmd="" taksId="cache"><RakeTask description="Clears a db/schema_cache.dump file" fullCmd="db:schema:cache:clear" taksId="clear" /><RakeTask description="Creates a db/schema_cache.dump file" fullCmd="db:schema:cache:dump" taksId="dump" /></RakeGroup><RakeTask description="Creates a db/schema.rb file that is portable against any DB supported by Active Record" fullCmd="db:schema:dump" taksId="dump" /><RakeTask description="Loads a schema.rb file into the database" fullCmd="db:schema:load" taksId="load" /><RakeTask description="" fullCmd="db:schema:load_if_ruby" taksId="load_if_ruby" /></RakeGroup><RakeTask description="Loads the seed data from db/seeds.rb" fullCmd="db:seed" taksId="seed" /><RakeTask description="Creates the database, loads the schema, and initializes with the seed data (use db:reset to also drop the database first)" fullCmd="db:setup" taksId="setup" /><RakeGroup description="" fullCmd="" taksId="structure"><RakeTask description="Dumps the database structure to db/structure.sql" fullCmd="db:structure:dump" taksId="dump" /><RakeTask description="Recreates the databases from the structure.sql file" fullCmd="db:structure:load" taksId="load" /><RakeTask description="" fullCmd="db:structure:load_if_sql" taksId="load_if_sql" /></RakeGroup><RakeTask description="Retrieves the current schema version number" fullCmd="db:version" taksId="version" /><RakeTask description="" fullCmd="db:_dump" taksId="_dump" /><RakeTask description="" fullCmd="db:abort_if_pending_migrations" taksId="abort_if_pending_migrations" /><RakeTask description="" fullCmd="db:charset" taksId="charset" /><RakeTask description="" fullCmd="db:check_protected_environments" taksId="check_protected_environments" /><RakeTask description="" fullCmd="db:collation" taksId="collation" /><RakeGroup description="" fullCmd="" taksId="create"><RakeTask description="" fullCmd="db:create:all" taksId="all" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="drop"><RakeTask description="" fullCmd="db:drop:_unsafe" taksId="_unsafe" /><RakeTask description="" fullCmd="db:drop:all" taksId="all" /></RakeGroup><RakeTask description="" fullCmd="db:forward" taksId="forward" /><RakeTask description="" fullCmd="db:load_config" taksId="load_config" /><RakeTask description="" fullCmd="db:purge" taksId="purge" /><RakeGroup description="" fullCmd="" taksId="purge"><RakeTask description="" fullCmd="db:purge:all" taksId="all" /></RakeGroup><RakeTask description="" fullCmd="db:reset" taksId="reset" /><RakeGroup description="" fullCmd="" taksId="test"><RakeTask description="" fullCmd="db:test:clone" taksId="clone" /><RakeTask description="" fullCmd="db:test:clone_schema" taksId="clone_schema" /><RakeTask description="" fullCmd="db:test:clone_structure" taksId="clone_structure" /><RakeTask description="" fullCmd="db:test:deprecated" taksId="deprecated" /><RakeTask description="" fullCmd="db:test:load" taksId="load" /><RakeTask description="" fullCmd="db:test:load_schema" taksId="load_schema" /><RakeTask description="" fullCmd="db:test:load_structure" taksId="load_structure" /><RakeTask description="" fullCmd="db:test:prepare" taksId="prepare" /><RakeTask description="" fullCmd="db:test:purge" taksId="purge" /></RakeGroup></RakeGroup><RakeGroup description="" fullCmd="" taksId="dev"><RakeTask description="Toggle development mode caching on/off" fullCmd="dev:cache" taksId="cache" /></RakeGroup><RakeTask description="Print out all defined initializers in the order they are invoked by Rails" fullCmd="initializers" taksId="initializers" /><RakeGroup description="" fullCmd="" taksId="log"><RakeTask description="Truncates all/specified *.log files in log/ to zero bytes (specify which logs with LOGS=test,development)" fullCmd="log:clear" taksId="clear" /></RakeGroup><RakeTask description="Prints out your Rack middleware stack" fullCmd="middleware" taksId="middleware" /><RakeTask description="Enumerate all annotations (use notes:optimize, :fixme, :todo for focus)" fullCmd="notes" taksId="notes" /><RakeGroup description="" fullCmd="" taksId="notes"><RakeTask description="Enumerate a custom annotation, specify with ANNOTATION=CUSTOM" fullCmd="notes:custom" taksId="custom" /><RakeTask description="" fullCmd="notes:fixme" taksId="fixme" /><RakeTask description="" fullCmd="notes:optimize" taksId="optimize" /><RakeTask description="" fullCmd="notes:todo" taksId="todo" /></RakeGroup><RakeTask description="Restart app by touching tmp/restart.txt" fullCmd="restart" taksId="restart" /><RakeTask description="Print out all defined routes in match order, with names" fullCmd="routes" taksId="routes" /><RakeTask description="Generate a cryptographically secure secret key (this is typically used to generate a secret for cookie sessions)" fullCmd="secret" taksId="secret" /><RakeTask description="Report code statistics (KLOCs, etc) from the application or engine" fullCmd="stats" taksId="stats" /><RakeTask description="Runs all tests in test folder" fullCmd="test" taksId="test" /><RakeGroup description="" fullCmd="" taksId="test"><RakeTask description="Run tests quickly, but also reset db" fullCmd="test:db" taksId="db" /><RakeTask description="" fullCmd="test:controllers" taksId="controllers" /><RakeTask description="" fullCmd="test:functionals" taksId="functionals" /><RakeTask description="" fullCmd="test:generators" taksId="generators" /><RakeTask description="" fullCmd="test:helpers" taksId="helpers" /><RakeTask description="" fullCmd="test:integration" taksId="integration" /><RakeTask description="" fullCmd="test:jobs" taksId="jobs" /><RakeTask description="" fullCmd="test:mailers" taksId="mailers" /><RakeTask description="" fullCmd="test:models" taksId="models" /><RakeTask description="" fullCmd="test:prepare" taksId="prepare" /><RakeTask description="" fullCmd="test:run" taksId="run" /><RakeTask description="" fullCmd="test:units" taksId="units" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="time"><RakeTask description="List all time zones, list by two-letter country code (`rails time:zones[US]`), or list by UTC offset (`rails time:zones[-8]`)" fullCmd="time:zones[country_or_offset]" taksId="zones[country_or_offset]" /><RakeTask description="" fullCmd="time:zones" taksId="zones" /><RakeGroup description="" fullCmd="" taksId="zones"><RakeTask description="" fullCmd="time:zones:all" taksId="all" /><RakeTask description="" fullCmd="time:zones:local" taksId="local" /><RakeTask description="" fullCmd="time:zones:us" taksId="us" /></RakeGroup></RakeGroup><RakeGroup description="" fullCmd="" taksId="tmp"><RakeTask description="Clear cache and socket files from tmp/ (narrow w/ tmp:cache:clear, tmp:sockets:clear)" fullCmd="tmp:clear" taksId="clear" /><RakeTask description="Creates tmp directories for cache, sockets, and pids" fullCmd="tmp:create" taksId="create" /><RakeGroup description="" fullCmd="" taksId="cache"><RakeTask description="" fullCmd="tmp:cache:clear" taksId="clear" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="pids"><RakeTask description="" fullCmd="tmp:pids:clear" taksId="clear" /></RakeGroup><RakeGroup description="" fullCmd="" taksId="sockets"><RakeTask description="" fullCmd="tmp:sockets:clear" taksId="clear" /></RakeGroup></RakeGroup><RakeTask description="" fullCmd="default" taksId="default" /><RakeTask description="" fullCmd="environment" taksId="environment" /><RakeGroup description="" fullCmd="" taksId="rails"><RakeTask description="" fullCmd="rails:template" taksId="template" /><RakeGroup description="" fullCmd="" taksId="templates"><RakeTask description="" fullCmd="rails:templates:copy" taksId="copy" /></RakeGroup><RakeTask description="" fullCmd="rails:update" taksId="update" /><RakeGroup description="" fullCmd="" taksId="update"><RakeTask description="" fullCmd="rails:update:bin" taksId="bin" /><RakeTask description="" fullCmd="rails:update:configs" taksId="configs" /></RakeGroup></RakeGroup><RakeGroup description="" fullCmd="" taksId="railties"><RakeGroup description="" fullCmd="" taksId="install"><RakeTask description="" fullCmd="railties:install:migrations" taksId="migrations" /></RakeGroup></RakeGroup><RakeTask description="" fullCmd="tmp" taksId="tmp" /><RakeTask description="" fullCmd="tmp/cache" taksId="tmp/cache" /><RakeTask description="" fullCmd="tmp/cache/assets" taksId="tmp/cache/assets" /><RakeTask description="" fullCmd="tmp/pids" taksId="tmp/pids" /><RakeTask description="" fullCmd="tmp/sockets" taksId="tmp/sockets" /></RakeGroup></Settings>
diff --git a/.idea/guoren.iml b/.idea/guoren.iml
deleted file mode 100644
index bd07381..0000000
--- a/.idea/guoren.iml
+++ /dev/null
@@ -1,193 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="RUBY_MODULE" version="4">
-  <component name="FacetManager">
-    <facet type="RailsFacetType" name="Ruby on Rails">
-      <configuration>
-        <RAILS_FACET_CONFIG_ID NAME="RAILS_FACET_SUPPORT_REMOVED" VALUE="false" />
-        <RAILS_FACET_CONFIG_ID NAME="RAILS_TESTS_SOURCES_PATCHED" VALUE="true" />
-        <RAILS_FACET_CONFIG_ID NAME="RAILS_FACET_APPLICATION_ROOT" VALUE="$MODULE_DIR$" />
-      </configuration>
-    </facet>
-  </component>
-  <component name="ModuleRunConfigurationManager">
-    <configuration default="false" name="test: guoren" type="RakeRunConfigurationType" factoryName="Rake">
-      <module name="guoren" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-      <envs>
-        <env name="RAILS_ENV" value="test" />
-      </envs>
-      <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-      <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-      <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-        <COVERAGE_PATTERN ENABLED="true">
-          <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-        </COVERAGE_PATTERN>
-      </EXTENSION>
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_NAME" VALUE="test" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ARGS" VALUE="" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ATTACHED_TEST_FRAMEWORKS" VALUE=":test_unit " />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_TRACE" VALUE="false" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_DRYRUN" VALUE="false" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_PREREQS" VALUE="false" />
-      <method />
-    </configuration>
-    <configuration default="false" name="spec: guoren" type="RakeRunConfigurationType" factoryName="Rake">
-      <module name="guoren" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-      <envs />
-      <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-      <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-      <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-        <COVERAGE_PATTERN ENABLED="true">
-          <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-        </COVERAGE_PATTERN>
-      </EXTENSION>
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_NAME" VALUE="spec" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ARGS" VALUE="" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ATTACHED_TEST_FRAMEWORKS" VALUE=":rspec " />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_TRACE" VALUE="false" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_DRYRUN" VALUE="false" />
-      <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_PREREQS" VALUE="false" />
-      <method />
-    </configuration>
-    <configuration default="false" name="Production: guoren" type="RailsRunConfigurationType" factoryName="Rails">
-      <predefined_log_file id="RUBY_RAILS_SERVER" enabled="true" />
-      <module name="guoren" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-      <envs />
-      <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-      <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-      <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-        <COVERAGE_PATTERN ENABLED="true">
-          <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-        </COVERAGE_PATTERN>
-      </EXTENSION>
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SCRIPT_ARGS" VALUE="" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="PORT" VALUE="3000" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="IP" VALUE="0.0.0.0" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="DUMMY_APP" VALUE="test/dummy" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RAILS_SERVER_TYPE" VALUE="Default" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ENVIRONMENT_TYPE" VALUE="production" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="LAUNCH_JS" VALUE="false" />
-      <method />
-    </configuration>
-    <configuration default="false" name="Development: guoren" type="RailsRunConfigurationType" factoryName="Rails">
-      <predefined_log_file id="RUBY_RAILS_SERVER" enabled="true" />
-      <module name="guoren" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-      <envs />
-      <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-      <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-      <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-        <COVERAGE_PATTERN ENABLED="true">
-          <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-        </COVERAGE_PATTERN>
-      </EXTENSION>
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SCRIPT_ARGS" VALUE="" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="PORT" VALUE="3000" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="IP" VALUE="0.0.0.0" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="DUMMY_APP" VALUE="test/dummy" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RAILS_SERVER_TYPE" VALUE="Default" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ENVIRONMENT_TYPE" VALUE="development" />
-      <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="LAUNCH_JS" VALUE="false" />
-      <method />
-    </configuration>
-  </component>
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
-      <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
-      <excludeFolder url="file://$MODULE_DIR$/.bundle" />
-      <excludeFolder url="file://$MODULE_DIR$/components" />
-      <excludeFolder url="file://$MODULE_DIR$/public/system" />
-      <excludeFolder url="file://$MODULE_DIR$/tmp" />
-      <excludeFolder url="file://$MODULE_DIR$/vendor/bundle" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" scope="PROVIDED" name="actioncable (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="actionmailer (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="actionpack (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="actionview (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="activejob (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="activemodel (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="activerecord (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="activesupport (v5.0.0.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="arel (v7.1.4, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="bcrypt (v3.1.11, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="builder (v3.2.2, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="bundler (v1.13.6, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="byebug (v9.0.6, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="coffee-rails (v4.2.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="coffee-script (v2.4.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="coffee-script-source (v1.11.1, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="concurrent-ruby (v1.0.2, rbenv: 2.3.1) [gem]" level="application" />
-    <orderEntry type="library" scope="PROVIDED" name="debug_inspector (v0.0.2, rbenv: 2.3.1) [gem]" level="application" />
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-  <component name="RModuleSettingsStorage">
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\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index 9d57d9d..0000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectRootManager" version="2" project-jdk-name="rbenv: 2.3.1" project-jdk-type="RUBY_SDK" />
-</project>
\ No newline at end of file
diff --git a/.idea/runConfigurations/Development__guoren.xml b/.idea/runConfigurations/Development__guoren.xml
deleted file mode 100644
index 7c3f68c..0000000
--- a/.idea/runConfigurations/Development__guoren.xml
+++ /dev/null
@@ -1,27 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Development: guoren" type="RailsRunConfigurationType" factoryName="Rails">
-    <predefined_log_file id="RUBY_RAILS_SERVER" enabled="true" />
-    <module name="guoren" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-    <envs />
-    <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-    <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-    <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-      <COVERAGE_PATTERN ENABLED="true">
-        <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-      </COVERAGE_PATTERN>
-    </EXTENSION>
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SCRIPT_ARGS" VALUE="" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="PORT" VALUE="3000" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="IP" VALUE="0.0.0.0" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="DUMMY_APP" VALUE="test/dummy" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RAILS_SERVER_TYPE" VALUE="Default" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ENVIRONMENT_TYPE" VALUE="development" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="LAUNCH_JS" VALUE="false" />
-    <method />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/Production__guoren.xml b/.idea/runConfigurations/Production__guoren.xml
deleted file mode 100644
index 0d25565..0000000
--- a/.idea/runConfigurations/Production__guoren.xml
+++ /dev/null
@@ -1,27 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Production: guoren" type="RailsRunConfigurationType" factoryName="Rails">
-    <predefined_log_file id="RUBY_RAILS_SERVER" enabled="true" />
-    <module name="guoren" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-    <envs />
-    <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-    <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-    <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-      <COVERAGE_PATTERN ENABLED="true">
-        <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-      </COVERAGE_PATTERN>
-    </EXTENSION>
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="SCRIPT_ARGS" VALUE="" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="PORT" VALUE="3000" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="IP" VALUE="0.0.0.0" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="DUMMY_APP" VALUE="test/dummy" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="RAILS_SERVER_TYPE" VALUE="Default" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="ENVIRONMENT_TYPE" VALUE="production" />
-    <RAILS_SERVER_CONFIG_SETTINGS_ID NAME="LAUNCH_JS" VALUE="false" />
-    <method />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/spec__guoren.xml b/.idea/runConfigurations/spec__guoren.xml
deleted file mode 100644
index 9dfd121..0000000
--- a/.idea/runConfigurations/spec__guoren.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="spec: guoren" type="RakeRunConfigurationType" factoryName="Rake">
-    <module name="guoren" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-    <envs />
-    <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-    <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-    <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-      <COVERAGE_PATTERN ENABLED="true">
-        <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-      </COVERAGE_PATTERN>
-    </EXTENSION>
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_NAME" VALUE="spec" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ARGS" VALUE="" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ATTACHED_TEST_FRAMEWORKS" VALUE=":rspec " />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_TRACE" VALUE="false" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_DRYRUN" VALUE="false" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_PREREQS" VALUE="false" />
-    <method />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/.idea/runConfigurations/test__guoren.xml b/.idea/runConfigurations/test__guoren.xml
deleted file mode 100644
index ae53fc4..0000000
--- a/.idea/runConfigurations/test__guoren.xml
+++ /dev/null
@@ -1,27 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="test: guoren" type="RakeRunConfigurationType" factoryName="Rake">
-    <module name="guoren" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RUBY_ARGS" VALUE="-e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift)" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="WORK DIR" VALUE="$MODULE_DIR$" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="SHOULD_USE_SDK" VALUE="false" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="ALTERN_SDK_NAME" VALUE="" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="myPassParentEnvs" VALUE="true" />
-    <envs>
-      <env name="RAILS_ENV" value="test" />
-    </envs>
-    <EXTENSION ID="BundlerRunConfigurationExtension" bundleExecEnabled="false" />
-    <EXTENSION ID="JRubyRunConfigurationExtension" NailgunExecEnabled="false" />
-    <EXTENSION ID="RubyCoverageRunConfigurationExtension" enabled="false" sample_coverage="true" track_test_folders="true" runner="rcov">
-      <COVERAGE_PATTERN ENABLED="true">
-        <PATTERN REGEXPS="/.rvm/" INCLUDED="false" />
-      </COVERAGE_PATTERN>
-    </EXTENSION>
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_NAME" VALUE="test" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ARGS" VALUE="" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_ATTACHED_TEST_FRAMEWORKS" VALUE=":test_unit " />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_TRACE" VALUE="false" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_DRYRUN" VALUE="false" />
-    <RAKE_RUN_CONFIG_SETTINGS_ID NAME="RAKE_TASK_OPTION_PREREQS" VALUE="false" />
-    <method />
-  </configuration>
-</component>
\ No newline at end of file
diff --git a/db/test.sqlite3 b/db/test.sqlite3
deleted file mode 100644
index c85337c..0000000
Binary files a/db/test.sqlite3 and /dev/null differ
diff --git a/log/.keep b/log/.keep
deleted file mode 100644
index e69de29..0000000