cleanup, rename variables
move observation count to Reporter
properly count unique networks
show unique network stats in metrics
remove non-unique network stats
Sync spanish translation
followup
Fix typo
always clear cells after flush
Merge pull request #1225 from cascheberg/fix

@cascheberg Always clear cells after flush
Merge pull request #1226 from cascheberg/fix-gps

@cascheberg Listen for GPSScanner.SUBJECT_LOCATION_LOST
Move responsibility for null checking (or otherwise invalid telephony) into CellScanner class.
Only display the "Center Me" button when the view is not centered

There's no need to have the button there obscuring the map when it would have
no effect to press it.
followup
Update Marathi translation
Merge pull request #1224 from rodmoreno/dev

Sync spanish translation
Update Hindi translation
Merge pull request #1228 from garvankeeley/cellscanner-move-null-check

Move responsibility for null checking into CellScanner class.
cleanup, rename variables
move observation count to Reporter