add famo.us and rename category "Frameworks"

Renamed MVC "frameworks" into "(MVC) Frameworks and Libraries" because of the following reasons:

* famo.us is definitely worth including, but it is not a **MVC** framework
* Backbone is **not** a framework

From [backbonejs.org](http://backbonejs.org/):

> Backbone is a library, not a framework, and plays well with others. You can embed Backbone widgets in Dojo apps without trouble, or use Backbone models as the data backing for D3 visualizations (to pick two entirely random examples).

* React is **not** a MVC framework

From [facebook.github.io/react/](http://facebook.github.io/react/):

> Lots of people use React as the V in MVC.