New document sidebar

This is the new redesigned sidebar UI for documents. The idea is that design doc functions will be first class citizens.

Screenshot:
![newsidebar](https://cloud.githubusercontent.com/assets/179458/3300201/37ceaa96-f61e-11e3-8375-276b17237660.png)

We are adding more Views with Views.Viewname in this file, but the View Object comes from `addons/documents/sidebarviews.js`. I am afraid this could lead to issues, where the time which module is loaded before is very important. I see we depend in sidebarviews on things like `DeleteDBModal `from this file, what is your opinion on loading this AMD module (documents/views.js) in `src/fauxton/app/addons/documents/views.js` as a dependency?