UI: ACLs, Notifications, Settings

Notably, this adds ACL support to the UI:

![screen shot 2014-08-22 at 5 26 20 pm](https://cloud.githubusercontent.com/assets/846194/4019079/439737f4-2a5c-11e4-8d24-06be91478bb8.png)

As well as notifications:

![foo](https://cloud.githubusercontent.com/assets/846194/4019082/4c3d5c1c-2a5c-11e4-8e9f-b595aa135655.gif)

Finally, a simple settings page (this gives us a foundation to build off of for further settings):

![screen shot 2014-08-22 at 5 28 12 pm](https://cloud.githubusercontent.com/assets/846194/4019087/8073c6ec-2a5c-11e4-8798-a4401d26b9d3.png)

It also redesigns the top bar a bit:

![screen shot 2014-08-22 at 5 28 00 pm](https://cloud.githubusercontent.com/assets/846194/4019088/85b8033e-2a5c-11e4-9cbf-cbcfa28987ef.png)

Notifications will be added to all actions, as well as notifying for failing checks, in a follow-on PR prior to next release.