feat(Angular): provide minErr as public property

This allows us to use minErr in other modules, such as resource and sanitize.

src/AngularPublic.js

@@ -44,6 +44,7 @@ function publishExternalAPI(angular){
     'isNumber': isNumber,
     'isElement': isElement,
     'isArray': isArray,
+    '$$minErr': minErr,
     'version': version,
     'isDate': isDate,
     'lowercase': lowercase,

src/ngResource/resource.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var ngResourceMinErr = minErr('ngResource');
+var ngResourceMinErr = angular.$$minErr('ngResource');
 
 /**
  * @ngdoc overview

src/ngSanitize/sanitize.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var ngSanitizeMinErr = minErr('ngSanitize');
+var ngSanitizeMinErr = angular.$$minErr('ngSanitize');
 
 /**
  * @ngdoc overview