Add collision data to map

* Get data from SODA API using HTTParty
* Clean data and enter into database
* Add markers representing data to map using MapBoxJS
* Move map directly into home show page
* Improve use of MapBox gem
Very interesting. This seems almost like what the parser could when creating a new incident. Or even better than that I like the idea of a Service Object that parses this data. Maybe it's a naming issue.