title: Cakephp 3.0 Class 'App\Controller\App' not found error
body: <p>I got this error when I tried to integrate Plugins for charts. The plugins I found online are all for cake version 2.*. I try to did the same for 3.0 and got this error.Here's my code.I also tried high charts and got the same thing.</p>
  
  <pre><code>use App\Controller\AppController;
  
  
  App::uses('AppController', 'Controller');
  App::uses('GoogleCharts', 'GoogleCharts.Lib');
  
  class ChartsController extends AppController {
  
    public $helpers = array('GoogleCharts.GoogleCharts');
  
  //Setup data for chart
    public function index() {
    $chart = new GoogleCharts();
  
    $chart-&gt;type("LineChart");  
      //Options array holds all options for Chart API
      $chart-&gt;options(array('title' =&gt; "Recent Scores")); 
      $chart-&gt;columns(array(
          //Each column key should correspond to a field in your data array
          'event_date' =&gt; array(
              //Tells the chart what type of data this is
              'type' =&gt; 'string',     
              //The chart label for this column           
              'label' =&gt; 'Date'
          ),
          'score' =&gt; array(
              'type' =&gt; 'number',
              'label' =&gt; 'Score',
              //Optional NumberFormat pattern
              'format' =&gt; '#,###'
          )
      ));
  
  //You can also manually add rows: 
      $chart-&gt;addRow(array('event_date' =&gt; '1/1/2012', 'score' =&gt; 55));
  
  //Set the chart for your view
      $this-&gt;set(compact('chart'));
      }
  }
  </code></pre>