Add cell data to the lookup requests in MapActivity

Partially-Fixes #354.
Add "Scan AP's even when Wi-FI is off" [#32]
values-es (@stripTM)
Synch. german translation with the latest english version.
Update spanish strings
Updated German translation
Update strings.xml
Merge pull request #504 from romankl/de-translation

Update German translation (@romankl and @Djfe)
Merge pull request #508 from rodmoreno/master

Update Spanish strings (@rodmoreno and @stripTM)
Merge pull request #501 from tamcap/send_cell_data

Add cell data to the lookup requests in MapActivity (@tamcap)
Merge pull request #493 from illarionov/wifiScanAlways

Add "Scan AP's even when Wi-FI is off" setting [fix #32] (@illarionov)