Replace some constants in ui_splevel/ui_sppostgame

Did some other clean up in them as well.
Add new color scheme variables to q3_ui
Use ARENAS_PER_TIER instead of 4 in ui_sparena.c
Add cl_voip to q3_ui network menu
Add anaglyph and greyscale to q3_ui display menu
Merge remote-tracking branch 'spearmint/master'

Conflicts:
	code/q3_ui/ui_cinematics.c
	code/q3_ui/ui_controls2.c
	code/q3_ui/ui_demo2.c
	code/q3_ui/ui_display.c
	code/q3_ui/ui_ingame.c
	code/q3_ui/ui_local.h
	code/q3_ui/ui_menu.c
	code/q3_ui/ui_network.c
	code/q3_ui/ui_qmenu.c
	code/q3_ui/ui_serverinfo.c
	code/q3_ui/ui_setup.c
	code/q3_ui/ui_specifyserver.c
	code/q3_ui/ui_splevel.c
	code/q3_ui/ui_sppostgame.c
	code/q3_ui/ui_spskill.c
	code/q3_ui/ui_video.c