Platypus v0.7.3

Minor Changes

1. Mover: Mover now allows manipulation of an entity's velocity outside of the entity itself and incorporates those changes into the entity's motion.
2. Made several optimizations in core methods including vector/vector projections, object recycling, and triggering events.

Bug Fixes

1. Mover: Moving an object into another object that's moving away from the first object no longer results in the first object stopping completely; instead, it now progresses at the same rate as the other object along the other object's movement vector.
2. Orientation: Fixed a bug that caused an object's relative position while tweening its orientation to be incorrect.
3. TiledLoader: Properties set on tile layers are now passed into the game as properties on the corresponding layer entity.