Moved updating to  runOnUiThread. Prints out current coordinates and moves
map marker.
Using Google Play Services to fetch and update location and speed estimate
Added routing functionality
Split maps into active and route selection. Implemented route selection with clear all.
Added go home button to route mode
Polyline and LatLng arrays are now passed from RouteSelection into
MapModeSelect, which in turn passes to MapsActivity when
MapsActivity is chosen.

TODO: Build an existing route in MapsActivity
Route selected in RouteSelection activity now gets rebuilt in MapsActivity.
fixed stringsXml conflict