Add lightJunior from RTCW-MP (just frees entity)

Gets rid of "lightJunior doesn't have a spawn function" messages.
Add cgame misc_gamemodel support from WolfET
Add notsingle, notfree, notteam, etc checks to cgame
Add "!gametype" entity key from Open Arena

Allows specifying game types to not spawn entity in.
Merge remote-tracking branch 'spearmint/master'

Conflicts:
	code/game/bg_misc.c
	code/game/g_spawn.c