Adding Ink.Util.Json

Ink.Util.Json is a static module providing methods for serializing and parsing the JSON format.

     Ink.requireModules(['Ink.Util.Json_1'], function (Json) {
         var obj = {
             key1: 'value1',
             key2: 'value2',
             keyArray: ['arrayValue1', 'arrayValue2', 'arrayValue3']
         };
         Json.stringify(obj);  // The above object as a JSON string
         
         var source = '{"key": "value", "array": [true, null, false]}';
         Json.parse(source);  // The above JSON string as an object
     });

The API is similar to the standard JSON API present in modern browsers, speaking of which, when the `JSON` object is present, it is used instead of this module's parse/stringify code.