Get cell lat and long from the DB, else bother OpenBmap and cache it.
 On branch maps
	new file:   src/com/odo/kcl/mobileminer/CellLocationGetter.java
	modified:   src/com/odo/kcl/mobileminer/MainActivity.java
	modified:   src/com/odo/kcl/mobileminer/MinerData.java
	modified:   src/com/odo/kcl/mobileminer/MinerTables.java
	modified:   src/com/odo/kcl/mobileminer/OpenBmapCellRequest.java