Release 0.0.56 Smooth map movement animation

Map Movement Animations now ease in and out. Looks like the squaddies scoot to their destination and slow down once they're in place. There's also a bunch of refactoring to untangle the spaghetti mess I made.

Next up, I want to clean the attack screen. Add more animations and animation types for melee attacks, ranged attacks, and reacting to hits.