Add option to toggle in-line edditing on/off in JsonEditor

[ghost]

Hi, I modified the jquery.jsoneditor.js script to optionally make the fields that display the JSON structure not-modifiable. Also I changed jsoneditor.js and jsoneditor.html to utilize this option. It's a great addition if you wan't only to display a beautified JSON but not modify it.

It looks like this, not very distinguishable, but the input fields are disabled

Also changed the jQuery script from 1.6 to 2.1.1, jquery.jsoneditor.js was failing because of the .on method currently on line 53 in my branch

Cheers

[mhwest13]

+1 works like a champ and is exactly the little bit I was after when I stumbled upon this beauty...

[jberger]

:+1: makes a beautiful editor double as a beautiful visualizer