title: Rails 4.0. vendor/assets/javascripts - Asset Pipeline issue
body: <p>I am running Rails 4.0.1 and Ruby 2.0.0.  I currently have a graph.js that takes inputs in from the user for a savings calculator in order to create a graph with d3 and the rickshaw.js graph.  </p>
  
  <p>My <code>graph.js</code> file is saved in the <code>app/assets/javascripts/graph.js</code>. I make a call to the Rickshaw graph with</p>
  
  <pre><code>var graph = new Rickshaw.Graph() 
  </code></pre>
  
  <p>I am getting an error of <code>Uncaught ReferenceError: Rickshaw is not defined.</code></p>
  
  <p>The <code>rickshaw.js</code> file is saved in <code>vendor/javascript/rickshaw.js</code> along with <code>d3.layout.js</code> and <code>d3.vs.js</code>.  If I save all of these files in the <code>app/assets/javascripts</code> everything works fine, but that does not seem to be the correct rails way. </p>
  
  <p>Does anyone know how to fix this error?</p>
  
  <p>Thank you. </p>