feat(NgMessages): introduce the NgMessages module and directives

The ngMessages module provides directives designed to better support
handling and reusing error messages within forms without the need to
rely on complex structural directives.

Please note that the API for ngMessages is experimental and may possibly change with
future releases.

Author: matsko

Gruntfile.js

@@ -122,6 +122,9 @@ module.exports = function(grunt) {
       ngLocale: {
         files: { src: 'src/ngLocale/**/*.js' },
       },
+      ngMessages: {
+        files: { src: 'src/ngMessages/**/*.js' },
+      },
       ngMock: {
         files: { src: 'src/ngMock/**/*.js' },
       },
@@ -190,6 +193,10 @@ module.exports = function(grunt) {
         dest: 'build/angular-resource.js',
         src: util.wrap(files['angularModules']['ngResource'], 'module')
       },
+      messages: {
+        dest: 'build/angular-messages.js',
+        src: util.wrap(files['angularModules']['ngMessages'], 'module')
+      },
       animate: {
         dest: 'build/angular-animate.js',
         src: util.wrap(files['angularModules']['ngAnimate'], 'module')

angularFiles.js

@@ -80,6 +80,9 @@ angularFiles = {
     'ngCookies': [
       'src/ngCookies/cookies.js'
     ],
+    'ngMessages': [
+      'src/ngMessages/messages.js'
+    ],
     'ngResource': [
       'src/ngResource/resource.js'
     ],
@@ -128,6 +131,7 @@ angularFiles = {
     'test/auto/*.js',
     'test/ng/**/*.js',
     'test/ngAnimate/*.js',
+    'test/ngMessages/*.js',
     'test/ngCookies/*.js',
     'test/ngResource/*.js',
     'test/ngRoute/**/*.js',
@@ -189,6 +193,7 @@ angularFiles = {
 
 angularFiles['angularSrcModules'] = [].concat(
   angularFiles['angularModules']['ngAnimate'],
+  angularFiles['angularModules']['ngMessages'],
   angularFiles['angularModules']['ngCookies'],
   angularFiles['angularModules']['ngResource'],
   angularFiles['angularModules']['ngRoute'],

src/ngAnimate/animate.js

@@ -29,6 +29,8 @@
  * | {@link ng.directive:ngClass#usage_animations ngClass}                                                     | add and remove (the CSS class(es) present)                               |
  * | {@link ng.directive:ngShow#usage_animations ngShow} & {@link ng.directive:ngHide#usage_animations ngHide} | add and remove (the ng-hide class value)                                 |
  * | {@link ng.directive:form#usage_animations form} & {@link ng.directive:ngModel#usage_animations ngModel}   | add and remove (dirty, pristine, valid, invalid & all other validations) |
+ * | {@link ngMessages.directive:ngMessage#usage_animations ngMessages}                                        | add and remove (ng-active & ng-inactive)                                 |
+ * | {@link ngMessages.directive:ngMessage#usage_animations ngMessage}                                         | enter and leave                                                          |
  *
  * You can find out more information about animations upon visiting each directive page.
  *