Translate new string to spanish
Create client side prefs that extend the service prefs.
setLastMapCenter in onDestroy as well as onSaveInstanceState, no harm in
the extra call, and without it, I get cases where the last XY isn't set.
Merge pull request #799 from stripTM/patch-4

Translate new string to spanish
issue #800 addressing review items
Merge pull request #800 from garvankeeley/clientprefs

Create client side prefs that extend the service prefs.
Merge pull request #801 from garvankeeley/mapgpspref

MapActivity: last location not always set when switching views