Merge pull request #3004 from Zuhayr/master

Psychic villain gear.
Adds ability to change appearance for ERTs

* ERTs can change their own appearance
* Fixed an if statement I goof'd
Reticked and uncommented ERT

It's time
Weights the likelihood of command positions by your age.

For most head positions, a good age is between 25 and 60, with ages towards the middle of that being even better. 25 because I figure for stuff like research, engineer etc. they'll want someone with fresh knowledge. Captain's best age starts at 35 though, due to that being an "old geezer job".
Fix for ordering hidden supplypacks.
Merge pull request #3010 from CIB/feature

Weights the likelihood of command positions by your age.
Merge pull request #3011 from Kilakk/bleeding-edge-freeze

ERTs can change their appearance upon spawn-in
Merge pull request #3013 from Segrain/master

Special Operations crate.
Merge branch 'master' of https://github.com/Baystation12/Baystation12
Added mentalist items to the wizard's tower, added mental focus to the spellbook.