docs: add angular-animate to dependencies

Closes angular-ui#5290

misc/demo/index.html

@@ -157,6 +157,7 @@ <h3>Dependencies</h3>
                         <li><a href="http://angularjs.org" target="_blank">AngularJS</a> (requires AngularJS 1.4.x, tested with <%= ngversion %>).
                             0.14.3 is the last version of this library that supports AngularJS 1.3.x and
                             0.12.0 is the last version that supports AngularJS 1.2.x.</li>
+                        <li><a href="http://angularjs.org" target="_blank">Angular-animate</a> (the version should match with your angular's, tested with <%= ngversion %>) if you plan in using animations, you need to load angular-animate as well.</li>
                         <li><a href="http://getbootstrap.com" target="_blank">Bootstrap CSS</a> (tested with version <%= bsversion %>).
                             This version of the library (<%= pkg.version%>) works only with Bootstrap CSS in version 3.x.
                             0.8.0 is the last version of this library that supports Bootstrap CSS in version 2.3.x.