title: Angular UI Bootstrap and Angular Color Picker return undefined for ng-model
body: <p>In my application i need a color picker with alpha transparency and after searching finally find <a href="https://github.com/buberdds/angular-bootstrap-colorpicker" rel="nofollow">angular-bootstrap-colorpicker</a> so i try to use this.when normally i use this plugin it work and <code>ng-model</code> correctly but when i use this directive in angular-ui bootstrap , the plugin doesn't work and return undefined.
  for this problem i create a <a href="http://jsbin.com/hebiz/7/" rel="nofollow">jsbin</a> with tabed mode and normal bod . 
  i have same problem with other directives of angular-ui bootstrap like <code>modal</code></p>