Commit cleanup

Just cleaned up and consistified a bunch of stuff in the commit modal. Now looks like:

![Screen Shot 2013-03-21 at 5 04 49 PM](https://f.cloud.github.com/assets/108094/288154/3cdeedb0-926b-11e2-8761-a65f8db5a06f.png)

Todo:

- [x] hide 'close' button during loading modal
- [x] make illustrations for success modal