Add Bootstrap and Underscore to asset pipeline

Add to Bowerfile:
	asset 'underscore'
	asset 'bootstrap-sass'

Add to home.html:
	<div class="container">
  		<h1 class="text-center">Logicalicy</h1>
  		<h2>{{ foo }}</h2>
  		Value of "foo": {{foo}}
	</div>

Add to application.js:
	//= require underscore
	//= require bootstrap-sass

Add to main.css.scss:
	@import "bootstrap-sass.css";

Commands run:
	rake bower:install