Use global jQuery/Zepto without directly referencing window.

Allows me to manually set the local value of jQuery.  My use-case being to have a build step that wraps backbone.stickit with an AMD define()
Explicitly pass Backbone into our iife + piggy back off of its reference to `$`
Merge branch 'master' of github.com:uglymunky/backbone.stickit into uglymunky-master

* 'master' of github.com:uglymunky/backbone.stickit:
  Explicitly pass Backbone into our iife + piggy back off of its reference to `$`
  Use global jQuery/Zepto without directly referencing window.
Merge branch 'master' into uglymunky-master

* master:
  commit latest backbone and fix tests
pass in Backbone, reference Backbone.$