Add mapconfigs

Add support for mapconfigs, cvar cg_mapconfigs.
Vefore mapconfig load the game checks for vid_restart or snd_restart
so the game does not hang up.
Add command to lock/unlock teams in teambased gametypes

Add cvar g_teamLock (0 default/1/2/3)
0 - off
1 - every teammember can lock the team
2 - only the teamleader can lock the team
3 - only a referee can lock teams(referees to come)

Add command "lock" to lock the team.
Add command "unlock" to unlock the team.
Merge branch 'mapconfigs' into pre-release

Conflicts:
	code/cgame/cg_local.h
	code/cgame/cg_main.c
Merge branch 'teamlock' into pre-release

Conflicts:
	code/cgame/cg_consolecmds.c
	code/game/g_cmds.c
	code/game/g_local.h
	code/game/g_main.c