title: How to load vendor asset folder in Rails 4?
body: <p>I have a plugin with many types of files, and its own tree structure (html, css, js, documentation, images, etc)</p>
  
  <p>Rather than going through the plugin folder, and splitting all the css and js files into the <code>vendor/assets/js/</code> <code>vendor/assets/css/</code> folders, I want to just keep the entire plugin folder as is. For example, </p>
  
  <p><code>vendor/assets/multipurpose_bookshelf_slider/</code></p>
  
  <p>How do I make sure the paths load properly, and reference them in my manifest files?</p>
  
  <p>Currently, I have some files place as follows (not exhaustive)</p>
  
  <pre><code>/my_app/vendor/assets/multipurpose_bookshelf_slider/css/skin01.css
  /my_app/vendor/assets/multipurpose_bookshelf_slider/js/jquery.easing.1.3.js
  /my_app/vendor/assets/multipurpose_bookshelf_slider/
  /my_app/vendor/assets/multipurpose_bookshelf_slider/
  </code></pre>
  
  <p>I'm referencing them in </p>
  
  <p><code>application.js</code></p>
  
  <pre><code>//= require multipurpose_bookshelf_slider/js/jquery.easing.1.3.js
  //= require multipurpose_bookshelf_slider/js/jquery.bookshelfslider.min.js
  </code></pre>
  
  <p><code>application.css.scss</code></p>
  
  <pre><code>@import "css/bookshelf_slider";
  @import "css/skin01";
  </code></pre>