Mark team for deletion when letting others know it has left during game. Should help with quitters problem.

Don't remove already removed team

wops add this too

reimplemented ResetKbd and calling it when exiting gsChat status, this restores behavior from.17: You can now walk -> press t/chat -> type some stuff while still walking -> exit gsChat and stop walking at that moment

android: fix the default make target

Android: add freezer commit message

add NOPNG to cmake to explicitly disable PNG dependency reorganise osx detection and variable initalization (simpler crosscompiling) in cmake

add GHC and GHFLAGS from cmake too

rename a few internal cmake variables (for consistency and readability)

Replaced matrix related FFP code with explicit matrix calculations. The modelview matrices now get uploaded at a single point via glLoadMatrix4 rather than using the GL1 matrix stack. In the GL2 variant this will become a uniform upload.