title: angularjs timepicker ng-change
body: <p>I am using AngularJS TimePicker (ui.bootstrap.timepicker).  I would like to fire an event when the timepicker is changed.  I looked for an ng-change attribute, but did not find one.</p>
  
  <p>My purpose is that I would like to save the changes that are made to the model when the time is changed.  Right now I've used ng-model to set the model, but I cannot figure out how to notify the controller so it can perform the save (the model is serialized to localstorage).  I would like to avoid the use of a "Save" button if possible.</p>
  
  <p>On a related note, I would also like to do the same thing for ui.bootstrap.datepicker.</p>