Big Update

Standard moves, attacks, defends and passes are out. Introducing quick
moves:
-Clicking on a tile will move to that tile.
-Clicking on an enemy unit that is in range will basic attack that unit
-Clicking on the active unit will make it defend, or pass if it is a
ranger

Arrow key scrolling added

Units can pass through other allied units when moving.

Units can only move once per turn. This is to facilitate move area
highlighting, which is now calculated at the beginning of the turn and
cached for future reference. This is blazing fast.