Add make task for releasing new versions

Makefile

@@ -1,8 +1,10 @@
 BIN := ./node_modules/.bin
 TEST_FILES := test/support/globals.js $(shell find test/specs -type f -name "*.js")
 
+VERSION := $(shell node -e "console.log(require('./package.json').version)")
+
 # Our 'phony' make targets (don't involve any file changes)
-.PHONY: test bdd lint
+.PHONY: test bdd lint release
 
 # Run Mocha, with standard reporter.
 test:
@@ -15,3 +17,9 @@ bdd:
 # Run JSHint
 lint:
 	@$(BIN)/jshint ./lib
+
+# Cuts/publishes a new release
+release:
+	@git tag -m "$(VERSION)" v$(VERSION)
+	@git push --tags
+	@npm publish ./