Update bower to use a newer Backbone version

[rmisio]

The bower.json file currently has backbone <=1.1.0 as a dependency. Since the repo readme example is using Backbone 1.1.2, can the bower.json be adjusted to follow suit?

The main benefit of the more recent Backbone version is that it includes AMD and CommonJS support. Without it, we not only have to shim this project (backbonefire), but then we have to revert back to shimming Backbone and Underscore.

On a related note, is adding AMD / CommonJS support to this project on the horizon anytime soon?

[hefox]

I encountered this also -- working on a project that is using 1.2.3. The current version of backbone is 1.3.3