Small changes

Hey all --

I just made a few small changes before I start helping out with bigger tasks. (As an intro: I've come to a few CfB / Open Gov Boston events but I haven't had a schedule that allows me to get to many of them. I'm a geographer by training and have been looking to get into geospatial / local culture / open data web apps.)

#### Anyway, the changes:

+ Added [foreman](https://github.com/ddollar/foreman) and created a Procfile that starts the rails server and mongo. Before this I was running `mongod` in one terminal window and `rails s` in another.
+ Refactored event display into a partial.
+ Added a _really_ simple rake task to fill the db with sample events, which can be expounded upon later to include more sample data. Run with `rake db:populate`.