Megaman animations

Trying out some methods for drawing sprites depending on character state.

Bindings:
A = Move left
D = Move right
F = Shoot
G = Jump

Changelog:
* NEW: Press S to change skin. Currently only two skins implemented
* NEW: Hold down H to start charging your weapon. Currently does nothing but change the colors
* Unlocked the camera Z, this makes jumping and shooting feel a lot more smooth.
* Modified the color tint, so it looks closer to the original.
* Modified the controls to better suit mobile
* G now Jumps instead of blinking.
* Megaman can now shoot three bullets!
* bugfix: blinking and shooting at the same time picked the wrong sprite
* Added a shooting animation (press F)
* bugfix: Blinking ruined running animations