added no_cdn option no windhsaft provider

NEWS

@@ -1,6 +1,8 @@
 2.4.xx
     - Adds support for several auth_token param
     - Adds support for cdn_url in winshaft provider
+    - Add option to jsonp to set custom callback name
+    - Add no_cdn option to windshaft provider
 
 2.4.01
     - fixed rectangle anchor and size #42

lib/torque/provider.windshaft.js

@@ -353,7 +353,7 @@
     url: function() {
       var opts = this.options;
       var protocol = opts.tiler_protocol || 'http';
-      if (!this.options.cdn_url) {
+      if (!this.options.cdn_url || this.options.no_cdn) {
         return this._tilerHost();
       }
       var h = protocol + "://"