Merge pull request #4 from Kyle873/master

PK3/PK7 Packaging Conveniences
Zombiemen/Shotgunners now shoot from their gun rather than their center of bodies. Lasers now have an impact sound and decal.
More destructable environmental stuff.
We have an M_Doom logo!
Misc updates, making sure the github is on par with the pk3.
Sgt. Shivers made a change to the logo. It looks cooler now.
boop
!getcvar != getcvar
Menu theme is a little bit softer, as per marrub's request.
Grenade Launcher's dryfire is no longer affected by random pitch.
Unique key graphics.
The most important change.
Wearing armor now protects your style meter from going down.
New HUD! Fullscreen is back to the old, simple HUD.
Zombiemen and Shotgunners don't have +MISSILEEVENMORE anymore. Chaingunners still do, though!
Skeleton on the HUD has had a 10% reduction in spookiness.
sqrt = zan_sqrt, for Kyle