Change Q_IsColorString to only identify real colors

Only colors 0 to 7 exist in engine, everything else just becomes those colors.
Add COM_SetExtension from Turtle Arena
Remove unused models from server_t
Merge remote-tracking branch 'ioquake3/master'

Conflicts:
	code/server/server.h
Move 3 MAX_* from q_shared.h to bg_misc.h
sync va() with spearmint
Merge remote-tracking branch 'spearmint/master'

Conflicts:
	code/qcommon/q_shared.h
Move MAX_PARTICLES_AREAS from q_shared.h to bg_misc.h
Move com_blood out of the engine
Change version to Alpha and protocol to 1
Merge remote-tracking branch 'spearmint/master'

Conflicts:
	Makefile
	code/game/g_main.c
	code/qcommon/common.c
	code/qcommon/q_shared.h
	code/qcommon/qcommon.h