Ajax support for POST FormData

Ajax.js

@@ -77,7 +77,7 @@
 			method = method || 'POST';
 			let stringData = '';
 			try{
-				stringData = JSON.stringify( data );
+				stringData = data instanceof FormData ? data : JSON.stringify( data );
 				cfg = transformCfg( cfg || {} );
 				cfg.url = url;
 

Observer.js

@@ -24,7 +24,6 @@ var Observable = (function(){
             }
         },
         fire: function( k ){
-            //console.log(k)
             var listeners = this._listeners[ k ],
               listener;
             if( listeners === void 0 )