Travis: examples install & build

.travis.yml

@@ -13,6 +13,7 @@ addons:
     - g++-4.8
 script:
   - npm run test
+  - npm run example:webapp:install
   - npm run example:webapp:build
 branches:
   only:
@@ -20,6 +21,7 @@ branches:
 cache:
   directories:
   - node_modules
+  - example/webapp/node_modules
 deploy:
  provider: pages
  skip_cleanup: true

package.json

@@ -12,11 +12,13 @@
     "test:watch": "npm test -- --watch",
     "prepublish": "npm run build",
     "release": "np",
+    "example:peripheral:install": "cd example/peripheral && npm install",
+    "example:peripheral:build": "cd example/peripheral && npm run build",
     "example:peripheral:start": "cd example/peripheral && npm start",
+    "example:webapp:install": "cd example/webapp && npm install", 
     "example:webapp:build": "cd example/webapp && npm run build",
     "example:webapp:deploy": "cd example/webapp && npm run deploy",
     "example:start": "npm run example:peripheral:start" ,
-    "example:build": "npm run example:webapp:build",
     "example:deploy": "npm run example:webapp:deploy"
   },
   "babel": {