chore(install): cleanup

- `package.json`: explicit path to `node_modules/.bin` isn't needed since npm prepends it to `PATH`. See [nmp scripts doc](https://docs.npmjs.com/misc/scripts#path). - `.bowerrc`: [Bower's default directory](http://bower.io/docs/config/#directory) is 'bower_components', hence no need to explicitly set it to this value.

Author: chalin

.bowerrc

@@ -21,7 +21,7 @@
  },
  "scripts": {
  "test": "echo \"Error: no test specified\" && exit 1",
- "postinstall": "./node_modules/.bin/bower install"
+ "postinstall": "bower install"
  },
  "dependencies": {
  "es6-module-loader": "^0.9.2",