title: jsTree not working
body: <p>I am new to jQuery and jsTree and I am not sure why I can't get it working?
  Using this tutorial:
  <a href="http://tkgospodinov.com/jstree-part-1-introduction/" rel="nofollow">http://tkgospodinov.com/jstree-part-1-introduction/</a></p>
  
  <p>And this html / javascript:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
      &lt;head&gt;
          &lt;meta charset="utf-8"&gt;
          &lt;meta http-equiv="x-ua-compatible" content="ie=edge"&gt;
          &lt;meta name="description" content=""&gt;
          &lt;title&gt;
              BLA BLA
          &lt;/title&gt;
          &lt;base href="/"&gt;
          &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
          &lt;!--
          &lt;link rel="stylesheet" href="css/styles.css"&gt;
          --&gt;
          &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"&gt; &lt;/script&gt;
          &lt;script type="text/javascript" src="jquery.jstree.js"&gt;&lt;/script&gt;
          &lt;script type="text/javascript"&gt;                                         
          $(document).ready(function() {
               $("#selector").jstree();
          });                                     
          &lt;/script&gt;
          &lt;/head&gt;
          &lt;body&gt;
              &lt;div id="selector"&gt;
                  &lt;ul&gt;
                      &lt;li&gt;&lt;a&gt;Team A's Projects&lt;/a&gt;
                          &lt;ul&gt;
                          &lt;li&gt;&lt;a&gt;Iteration 1&lt;/a&gt;
                              &lt;ul&gt;
                                  &lt;li&gt;&lt;a&gt;Story A&lt;/a&gt;&lt;/li&gt;
                                  &lt;li&gt;&lt;a&gt;Story B&lt;/a&gt;&lt;/li&gt;
                                  &lt;li&gt;&lt;a&gt;Story C&lt;/a&gt;&lt;/li&gt;
                              &lt;/ul&gt;
                              &lt;/li&gt;
                          &lt;li&gt;&lt;a&gt;Iteration 2&lt;/a&gt;
                          &lt;ul&gt;
                              &lt;li&gt;&lt;a&gt;Story D&lt;/a&gt;&lt;/li&gt;
                                &lt;/ul&gt;
                              &lt;/li&gt;
                          &lt;/ul&gt;
                      &lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/div&gt;
          &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Nothing seems to work.
  I get the following error:</p>
  
  <pre><code>$("#selector").jstree is not a function
  </code></pre>