ALL: Add plugin UMD wrapper, Closes #977

src/core.js

@@ -1,6 +1,4 @@
-(function( $ ) {
-
-$.extend( $.fn, {
+$.extend($.fn, {
 	// http://jqueryvalidation.org/validate/
 	validate: function( options ) {
 
@@ -1271,5 +1269,3 @@ $.extend( $.validator, {
 $.format = function deprecated() {
 	throw "$.format has been deprecated. Please use $.validator.format instead.";
 };
-
-}( jQuery ));