This way the user doesn't need to move the two folders googlemaps and
googlesat around in the filesystem.
This only works if Subsurface is started from the build directory - it
doesn't work when Subsurface is installed (and it doesn't at all address
the need to install these files and bundle them as well).
I'd consider this a hack to show how the real solution should work.
There is one more part of this that is a hack: Marble no longer searches
its default data directory; the path we set replaces the Marble system
search path. Sadly, Marble doesn't support paths the way Unix thinks of
them with multiple directories, separated by ':'. So this means that
Marble no longer finds any of its default icons. For most of them that
seems fine as I don't think lacking the icons for "manned_landing",
"robotic_rover", "unmanned_hard_landing" or the various types of places of
worship that Marble supports is necessarily a big issues for Subsurface,
but at least the default_location icon seemed important. And since we now
need to carry our own, I replaced the boring circle with a tiny dive flag.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
