Show vote keys on HUD during vote, modified vote message a bit
Don't use OpenAL by default, doesn't support multiple listeners

Multiple listeners are used by splitscreen mode.
Increase MAX_GENTITIES from 1024 to 4096
Merge remote-tracking branch 'spearmint/master'

Conflicts:
	code/cgame/cg_draw.c
	code/qcommon/q_shared.h