Added Overlay registration as a OnSharedPreferenceChangeListener
Merge branch 'testing' into testing_lacike
Added GpxFormatter

GpxFormatter is Locale and Timezone independent and it raplaced RecordedRouteGPXFormatter; Issue #1
Added GpxLogWriter, removed GpxTrack

Issue #1
Added menu button for clearing track

see comment at Issue #1
Merge branch 'gpxformatter' into testing_lacike
Merge remote branch 'origin/testing' into testing