Added the 'new value' link to allow adding new values arbitrarily while in the JSON editor.  Added a background color for null values.  Removed the old README and updated the markdown-based one instead.  Added a minified version of json2. Updated jQuery to 1.9.1
Merge pull request #10 from tobz/master

Add ability to add new values to objects/arrays in the editor + update for jQuery 1.9+