Adds Paramedic job as outlined on the forums. Reduces MD access to EVA,
adds some minor EMT clothing stuff, and fixes#8020 and the medgreen
armband while I was piddling around in sprites.
EMT alt title and indent fixed.
Now less broken.

The Icarus is now fireable in gun form. The point defense mode fires several lasers one after the other so that it can penetrate. The main gun mode fires a modified meteor. Also added an "abstract weapon" which has the projectile type settable for admin shenanigans.
Walls now lack an armor variable, which is replaced with buffed health. Normal walls take 4 shots with a normal laser or 5 emitter bursts to destroy. Reinforced walls now take 20 normal laser shots or 28 emitter shots.
Added some proactive runtime protection to logging for projectile impacts. Without a valid firer, the jump button is linked to the victim.
* Refactors projectile Bump()
* Converts projectile_type var strings to paths
* Reorganizes bullet projectile paths
* Made a pass through all the bullet_act() definitions. Mainly ensured that damage_type is checked when dealing damage to certain objects. Removed stupid /turf bullet_act() override, replaced with on_hit() overrides on the relevant projectiles.
* Adds shotgun pellets projectile. Adds Raptor's shotgun slug sprite.
* Gives stunshots more of their own identity, refluffs them as taser cartridges for shotguns. They still aren't obtainable anywhere unless spawned.
* Makes projectiles pass through girders and cultgirders with a certain probability, unless the girder itself was clicked.
* Projectiles are also able to pass through grilles. Low damage projectiles have a chance to be blocked by grilles. High damage projectiles have a chance to have some damage absorbed by the grille.
* Makes projectiles for blanks invisible.
* Adds flash bullet types
* Adds support for 'penetrating' projectiles
* Swaps .45 and 9mm projectile types. .45s hit slightly harder, 9mils have more ammo capacity.
Fixes a bug where carding an AI would free open a slot.
Adds cameras and holopads to the shuttle and a few areas at Centcom.
Adds check to AI's Life() to make sure it won't die in areas which have magical free power.
Adds subtype of oxygen canister, which starts off very cold. This is meant to replace the freezer on Centcom, and for the emergency shuttle's cryo.