title: Filtering with multiple checkboxes in angularJS
body: <p>I'm new to AngularJS. I wrote a program to filter the Item list when i check related check boxes. But here my CheckBoxes are behaving like "Radio" buttons. Anyway, program is working but it is not working with multiple check boxes. Please help me. </p>
  
  <p>My Program @ <a href="http://plnkr.co/edit/iV7wyYoCNJdY1Ze7J6Pg?p=preview" rel="noreferrer">http://plnkr.co/edit/iV7wyYoCNJdY1Ze7J6Pg?p=preview</a></p>