Fixed issue 2: Pause/unpause notifications no longer show at the start of game
Fixed issue 1: units get an extra move when moving through towers

- Refactored AStarNode and AStar pathfinding from UnitFSM to ai.AStar
- UnitManager#move now finds the full path (using AStar#findPath) to determine if it can move
Steven updated several more icons
0.1.13 - Fixed movement bug