Syntax fixes to make grunt work

Author: dmzza

grunt.js

@@ -1,4 +1,3 @@
-use strict;
 var config = require("./config.json");
 
 module.exports = function( grunt ) {

page/ajax/ajax-and-forms.md

@@ -1,6 +1,6 @@
 ---
 title   : Ajax and Forms
-level		: beginner
+level: beginner
 ---
 
 jQuery’s ajax capabilities can be especially useful when dealing with forms. There are several advantages, which can range from serialization, to simple client-side validation (e.g. "Sorry, that username is taken"), to [prefilters](http://api.jquery.com/extending-ajax/#Prefilters) (explained below), and even more!