Eventbrite Support

Fixes #2 

- added stying to upcoming events
- added helper to get events from event brite api (need to move out of helper eventually)
- added presenter class for events
- hooked up upcoming events to view

Not 100% done, but I think it's good enough to put in.  Probably want better messaging in the upcoming events section when an event comes back null (right now I just display N/A).  Don't forget to set ENV variables for Eventbrite or the site will crash and burn.

If @jmacs created an account, maybe we should deploy this thing somewhere and set the ENV variables up.