docs(guide/forms): add animated gifs for forms

docs/content/guide/forms.ngdoc

@@ -195,6 +195,8 @@ bind only to specified list of events. I.e. `ng-model-options="{ updateOn: 'blur
 and validate only after the control loses focus. You can set several events using a space delimited
 list. I.e. `ng-model-options="{ updateOn: 'mousedown blur' }"`
 
+<img alt="animation showing debounced input" src="img/guide/forms-update-on-blur.gif">
+
 If you want to keep the default behavior and just add new events that may trigger the model update
 and validation, add "default" as one of the specified events.
 
@@ -232,6 +234,8 @@ You can delay the model update/validation by using the `debounce` key with the
 {@link ng.directive:ngModelOptions ngModelOptions} directive. This delay will also apply to
 parsers, validators and model flags like `$dirty` or `$pristine`.
 
+<img alt="animation showing debounced input" src="img/guide/forms-debounce.gif">
+
 I.e. `ng-model-options="{ debounce: 500 }"` will wait for half a second since
 the last content change before triggering the model update and form validation.
 

lib/grunt/utils.js

@@ -303,7 +303,7 @@ module.exports = {
   rewrite: function(){
     return function(req, res, next){
       var REWRITE = /\/(guide|api|cookbook|misc|tutorial|error).*$/,
-          IGNORED = /(\.(css|js|png|jpg)$|partials\/.*\.html$)/,
+          IGNORED = /(\.(css|js|png|jpg|gif)$|partials\/.*\.html$)/,
           match;
 
       if (!IGNORED.test(req.url) && (match = req.url.match(REWRITE))) {