new function WriteTGAfile. Also, put in the tga header structure.
NOTE: this is currently broken for non gcc ocmilers. you will get a
#error message.
include/quakefs.h source/quakefs.c:
new function COM_WriteBuffers. Like COM_WriteFile, but scatter/gather
style.
source/gl_screen.c source/screen.c:
misc cleanups. differences are getting fewer. should be mostly
mergable soon (minus truly sw/gl specific code).