gmod_game: Added ttt_fretta_mapvote cvar for skipping the gam..

Revision 573
Added ttt_fretta_mapvote cvar for skipping the gamemode part of a vote, so that fretta_voting can be used for map voting on TTT-only servers.
Changed Files:
[ul]
[li]trunk/gamemodes/terrortown/gamemode/cl_help.lua[/li][li]trunk/gamemodes/terrortown/gamemode/fretta_must_die.lua[/li][li]trunk/gamemodes/terrortown/gamemode/init.lua[/li][li]trunk/gamemodes/terrortown/gamemode/vgui/continuevote.lua[/li][/ul]
Committed By Stefan van der Meer