Updated jQuery and jQuery UI

Updated jQuery to 1.11.1.

Updated jQuery UI to 1.11.0 and created new theme based on existing one.
Updated Backbone and Underscore libraries

Updated Backbone.js to 1.1.2, and ensures collection.create waits for
response before updating the view.

Updated Underscore to 1.6.0, ensuring noConflict is used to avoid
conflict with babel.js.
Updated json2.js
Cleanup indentation (forgot to set noexpandtab in vim).
Merge pull request #40 from schwuk/upgrade_js_libraries

Upgrade JavaScript libraries