Add events

This is the beginning of the Event work in order to streamline our CoderDojoSF scheduling process. Still a long ways to go but wanted to share what I hacked together so far this weekend.

- [x] Event creation on Eventbrite.
- [ ] Create tickets and send invites on Eventbrite.
- [ ] Open registration on Eventbrite.
- [ ] API for Hubot to interact with service.
- [ ] Cron job/rake task to take Event through states to completion.

I made this a Rails app so that we can make it a front end to our events as well down the road. @nrrrdcore are there any UI frameworks besides sass/compass that you want setup and tested?

/cc @cameronmcefee @brntbeer @nrrrdcore @kneath