Add jobs functionality

Heavily based on internships app (which we should maybe think about deleting or redirecting?)

![jobs foundation for learning equality - google chrome_053](https://cloud.githubusercontent.com/assets/1319950/3835602/7db3acd4-1dc2-11e4-98b1-af39d21afbcb.png)
![selection_052](https://cloud.githubusercontent.com/assets/1319950/3835603/7f361178-1dc2-11e4-8d75-751d4675e6bb.png)