ng-animate support for ui-view

[rynz]

<ng-view id="ng-view" ng-animate="{enter: 'view-enter'}"></ng-view>
will apply the .view-enter-setup etc css classes when content is rendered/destroyed.

It would be nice if ui-view behaved the same.
<ui-view id="ng-view" ng-animate="{enter: 'view-enter'}"></ui-view>
and thus be able to manage animations the same way for transitioning views (states) in/out.

[rynz]

Submitted a pull request #80