Ghost buffed with AntagHUD

Created a new feature:  AntagHUD, allows ghosts to view who the antags are in the round and has a few different options.

Admins can disabled it globally or set restrictions, these are also have a default setting determined by the config file.

Admins can use "Toggle AntagHUD" to toggle it's usage by observers.  They can also use "Toggle AntagHUD restrictions" to restrict if players using AntagHUD can join in the rest of the round or not.  By default AntagHUD is turned on and restrictions are in use.

Admins can also pick if a specific user should be allowed to join the round even though they used AntagHUD by using the advminverb "Allow respawn character" and selecting the ghost.

Admins can also use the Job Bans functionality to ban specific users from being able to use AntagHUD.  It is placed for convenience under the non-human jobs portion be aware that clicking the title for non-human jobs, even though AntagHUD is listed under it will not also jobban AntagHUD.