Introduce NO_MARBLE define, make GlobeGPS a dummy

Some users have requested a way to build subsurface without marble. This
creates a GlobeGPS-dummy thats just a QLabel saying that marble is
disabled.

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Make GlobeGPS a dummy on android
Disable usermanual on android
Stub out the printing support on android
Introduce android specific file
Remove usermanual from menus