Bike and dock backend methods

@daotoo 
@jcurtiss 

Hey guys,
I did some work on the backend methods for the Bike and Dock models.

I completed:
* createDock
* setDockLocation
* createBike
* setBikeDamage
* findBikeById
* findDockById

Also, I created a "blowitup" method, which will remove everything from the database. It's just for debugging and testing purposes, we will delete it later.