title: fancytree not loading json data
body: <p>I am attempting to use fancytree to display some data returned from a php rest service. The data returned by the service has been validated via JSONLint and it appears in the format shown in the fancytree docs.</p>
  
  <p>If I have the developer tools window (Chrome) open it shows the error "Uncaught Error: Not implemented" in file jquery-1.11.3.min.js:2.</p>
  
  <p>When I validated the JSON data returned I was using the Advanced Rest Client (Google App) and I removed the double quotes which surrounded the string displayed by Advanced Rest Client, and then pasted the value into JSONLint. </p>
  
  <p>My jquery code:</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
      $(function(){
           var phpAPI = "http://localhost/clubjudge/api/JSONClassTree2";
           $.getJSON(phpAPI)
            .done(function(json) {
                alert(json);
                $("#tree").fancytree({
                   source: json
                   }
                );
             })
            .fail(function(jqxhr, textStatus, error) {
                var err = textStatus + ", "+ error;
                console.log("Request Failed: "+ err );
     });
  
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>Any help greatly appreciated as I have been messing with this for a couple of days now.
  PS. I hope the included code has formatted properly. The 'preview' doesn't seem to look right.</p>
  
  <p>Figured I'd better post the JSON data.</p>
  
  <pre><code>[
   {"title":"A - Australian Native","key":"1","children":[
       {"title":"A1 - Australian Native Dendrobium Species","key":"7"},
       {"title":"A2 - Australian Native Any Other Species","key":"8"},
       {"title":"A3 - Australian Native Dendrobium Hybrid","key":"9"},
       {"title":"A4 - Australian Native Any Other Hybrid","key":"10"},
       {"title":"A5 - Australian Native Seedling","key":"11"}
   ]},
   {"title":"B - Cymbidium","key":"2","children":[
       {"title":"B1 - Standard Type Cymbidium","key":"3"},
       {"title":"B2 - Intermediate Type Cymbidium","key":"4"},
       {"title":"B3 - Miniature Type Cymbidium","key":"5"},
       {"title":"B4 - Cymbidium Species","key":"6"}
   ]}
  ]
  </code></pre>
  
  <p>Sorry I realise there is a lot. Once again this is what the Advanced Rest Client shows (after trimming off the outer double quotes).</p>