Basic District Implementation

Not quite ready yet, still want to add a team@district view (so we can see full points breakdown, which district events a team attended). And we need a new icon for the nav drawer. Maybe just get rid of the plus sign in the one I have?

![drawer](https://cloud.githubusercontent.com/assets/2754863/3710237/12ec9e50-147c-11e4-93df-69fd98dd6879.png)
![events](https://cloud.githubusercontent.com/assets/2754863/3710238/12f0e190-147c-11e4-8a3c-cb9e17c225eb.png)
![list](https://cloud.githubusercontent.com/assets/2754863/3710239/12f1a206-147c-11e4-90e7-9c0f9849020d.png)
![rankings](https://cloud.githubusercontent.com/assets/2754863/3710240/12f27f0a-147c-11e4-9797-96051799dd74.png)