Asset groups

grouper

--- 
backbone:
  :context:
    :layouts:
    - content
  :files:
  - https://github.com/douglascrockford/JSON-js/blob/master/json2.js
  - http://documentcloud.github.com/underscore/underscore.js
  - http://documentcloud.github.com/backbone/backbone.js

jquery:
  :context:
    :selectors:
    - ".date_picker"
  :files: 
  - http://code.jquery.com/jquery-1.5.min.js

widgets:
  :context:
    :selectors:
    - "body"
  :sets:
  - jquery
  - backbone