Break up positionMapAt() so that setUserPositionAt() can happen independently
Listen for user moving map, and don't recenter from GPS until they touch "Refresh"
Remove mMap.invalidate() calls
Merge pull request #726 from keverets/pan-mode

Pan mode
Add icons and text to MapActivity to indicate the GPS fixes & satellites

Icon from https://www.iconfinder.com/icons/175171/gps_receiving_icon so if used
must include link to author's website: http://icons8.com/

Modified icon for the case of no fixes by removing semicircular lines.  Made
white and scaled for xxhdpi, xhdpi, hdpi, and mdpi.
Add latitude & longitude to the header bar
Add Cell and WiFi info to the bottom of the MapView