The huds won't be activated when there's just one wizard, but when another magic user is brought in the huds will appear for both of them to allow for easy identification in the face of rampant mindswaps and/or identity shinanagans and/or getting turned into a cow by a staff of change.
The huds are on by default in ragin' mages.
Makes hud_list associative, and introduces the /atom list hud_possible,
which lists all the possible hud images a certain atom can provide.
Replaces all the awful procs in the gamemodes with their new
/datum/atom_hud versions, which are much shorter, simpler and faster.