title: Angular ngInfiniteScroll not scrolling
body: <p>I'm trying to "refactor" an example provided by the author of the ngInfiniteScroll in a not-OOP way. (<a href="http://binarymuse.github.io/ngInfiniteScroll/demo_async.html#" rel="nofollow">http://binarymuse.github.io/ngInfiniteScroll/demo_async.html#</a>)
  Something is totally wrong in my code because the scrolling is not triggered. 
  A fix and explanation would be really appreciated.</p>
  
  <p>This is my plunker code:  <a href="http://plnkr.co/edit/hFHKhOvokL4ywGERExew?p=preview" rel="nofollow">http://plnkr.co/edit/hFHKhOvokL4ywGERExew?p=preview</a></p>