Upgrade to bootstrap 3

I went through and updated most of the interfaces to Bootstrap 3.1.1. 

The only other tweaks were:
- create a macro for the countries drop down menu and call that in the user form. 
- pulled the admin menu options into the primary nav and determine what's visible based on Sentry roles

(I had found the UI a little confusing going back and forth between admin and user views, and most modern UIs have them integrated.)

I still have a few forms left to polish (admin/users and admin/groups), but that shouldn't take long.

![screen shot 2014-03-22 at 5 41 34 am](https://f.cloud.github.com/assets/197404/2490376/39dcb06a-b1a6-11e3-9342-065a6e9619b7.png)
![screen shot 2014-03-22 at 5 42 22 am](https://f.cloud.github.com/assets/197404/2490377/4ab5d880-b1a6-11e3-82e9-46bc7c573dff.png)