docs(guide/Animations): describe your change...

As a result of angular#16561 - added ngAnimateSwap to `Which directives support animations?` table, so it's more visible.

Author: FRSgit

docs/content/guide/animations.ngdoc

@@ -236,6 +236,7 @@ triggered:
 | {@link ng.directive:ngModel#animations ngModel}                               | add and remove ({@link ng.directive:ngModel#css-classes various classes}) |
 | {@link ng.directive:form#animations form / ngForm}                            | add and remove ({@link ng.directive:form#css-classes various classes})    |
 | {@link module:ngMessages#animations ngMessages}                               | add and remove (the `ng-active`/`ng-inactive` classes)                    |
+| {@link ngAnimate.directive:ngAnimateSwap#animations ngAnimateSwap}            | enter and leave                                                           |
 
 For a full breakdown of the steps involved during each animation event, refer to the
 {@link ng.$animate API docs}.