QGeoAreaMonitor becomes loadable via plugins.

The polling-based default implementation is separated out into its own
plugin.

Task-number: QTBUG-31960
Change-Id: Ife25f6a83dd51f32fcd9ee3bfde1ca51291c78e4
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Increase reliability of nmea auto tests on Windows

The default timeouts seem to be to small

Change-Id: Idc9f9a4bd017a9ce1fb5de70f41075b8ff4bc0ed
Reviewed-by: Aaron McCarthy <mccarthy.aaron@gmail.com>