Implemented persistence of ride data

Added functionality to store and retrieve ride information via the
DataLayer object.
Removed temporary debugging code.

Removed the definition of two activities that were used while debugging.
Merge remote-tracking branch 'origin/master' into robin5-datalayer

Conflicts:
	RouteTracker/src/main/java/edu/pdx/cs/pedal/routetracker/RouteCalculator.java
Merge pull request #45 from PedalPDX/robin5-datalayer

Robin5 datalayer
close #45