for some reason neo/tools/compilers/dmap/optimize.cpp included windows.h
and GL/gl.h before including dmap.h, which indirectly includes qgl.h.
This made things in qgl.h explode - seems like APIENTRYP in the
QGLPROC() macro expanded to bullshit because of some APIENTRYP or
APIENTRY definition in windows.h or GL/gl.h
Those includes are totally unnecessary, dmap.h -> qgl.h already includes
GL/gl.h, indirectly via SDL_opengl.h and in that setup things somehow
are fine.
Don't include the lazy precompiled.h everywhere, only what's
required for the compilation unit.
platform.h needs to be included instead to provide all essential
defines and types.
All includes use the relative path to the neo or the game
specific root.
Move all idlib related includes from idlib/Lib.h to precompiled.h.
precompiled.h still exists for the MFC stuff in tools/.
Add some missing header guards.
variable set but not used
Removes some CollisionModel code under _DEBUG which was probably a
leftover, since it was completely useless (its done later anyways).
