Functional mapView control
-toggle for showing number of bikes or docks when idle/inactive/not biking
-cancel "x" button for clearing out the intended destination
-start/stop button states working
-"stick" the bike icon to the final destination when "Set Destination" is tapped, and use that instead of the standard red pin
-change label text at the bottom of the map when setting destination to show where to pick up and drop off your bike (TODO: make less verbose?)