Merge pull request #5 from IjonTichy/master

Half jump height when frozen, massively cleaned up pickup code
Chroma Storm pickups (partially) implemented, still needs a new sound, new Metroid pickup sequence, and the Minigun integrated to replace it with. Plasma Beam/Ice Beam radius/height slightly smaller.
Obituary for Chroma Storm.
Skulltag pickup replacements implemented, handled via metroid_skulltagweapons.
Updated credits, Samus dies slightly faster now.
Apparently these were never pushed?
Some ACS streamlining, NOTIMEFREEZE'd a bunch of shit on the DAKKA BEAM