Recent changes / fixes

- CrystalFall done
- Ice physics further improved, sliding is now much more dynamic and doesn't lock up controls
- Cogwhirl is 50% finished
- Added several types of traps for Cogwhirl, including steam vents, row-saws, and tumbling platforms.
- Started work on SilverSin strip, optimizing and redrawing
- Remapped Attack to A and grapple to D so you no longer have to move your left hand while controll character actions.
- sped up a couple platforms in CrystalFall.
- C'thalas now has 2 arms!!