Create com.mapzen.location package and relocate LocationHelper
Adds callbacks and failure listener constructor arguments.
Adds connect() and disconnect() methods.
Adds requestLocationUpdates() for GPS only.
Adds replacement LocationRequest class.
Adds interval, fastest interval, and min displacement to LocationRequest.
Adds replacement for gms LocationListener.
Passes fastest interval and min distance to location manager.
Merge pull request #80 from mapzen/location-helper-gps

Location updates via LocationHelper