Added jump/warp movement

[Jaggernaut555]

Addressing issue #45

• Allows attempts to jump 0/1/2/3 spaces, using distance * 300 energy.
• Distance in B register.
• Animation currently just walks real fast and through objects.
• Can't land on a blocked square.
• Can travel over blocked squares.
• If landing square is blocked, attempts to jump distance-1 instead (energy cost is determined at initial jump attempt)

[simon987]

I'm working to implement an animation to make this work client-side.