title: Play doesn't convert java-list to scala-list
body: <p>I have a controller which hands a java-list of model-objects to the view exactly the way like it's done in the examples. </p>
  
  <p>The compiler throws an error that it can't convert from <code>java.util.List</code> to <code>scala.collection.immutable.List</code>. I have no clue what I should do.</p>
  
  <pre><code>[error] /myapp/myappsubprojects/frontend/app/controllers/frontend/MyController.java:15: error: method render in class linklist cannot be applied to given types;
  [error]         return ok(linklist.render("link test", Link.findAll()));
  [error]                           ^
  [error]   required: String,scala.collection.immutable.List&lt;Link&gt;
  [error]   found: String,java.util.List&lt;Link&gt;
  [error]   reason: actual argument java.util.List&lt;Link&gt; cannot be converted to scala.collection.immutable.List&lt;Link&gt; by method invocation conversion
  [error] 1 error
  </code></pre>
  
  <p>Note: I'm using subprojects (common, frontend, backend) and I had a hard time to make everything run properly. Probably it's related to that.</p>