incremental texture loading works.
more incremental texture loading
Merge branch 'message_passing' of github.com:sim82/3dyne_legacy_engine into message_passing
dds texture loading
Merge branch 'message_passing' of github.com:sim82/3dyne_legacy_engine into message_passing

Conflicts:
	gc_service.cpp
	res_gltex.cpp
don't remember
Restructuring of some 'global' resources: queue and shell interpreter
lifetime now bound to mainloop call.

Merge branch 'message_passing' of github.com:sim82/3dyne_legacy_engine into message_passing

Conflicts:
	gc_service.cpp
	pan.h