0.3.5.5

Initial testing for enemy AI

- Enemies currently pick an idle distance and create a path of
waypoints that they patrol along. If they see an obstacle, they just
switch directions.

Added TestEnemyController.cs
Made enormous changes to Enemy.cs
Removed Shooting Enemy.prefab
Removed Simple Enemy.prefab
Removed SimpleEnemy.cs
In Galaxy.cs, Enemies communicate to the Galaxy
In Einstein.cs, the laser now fires from a start transform
New Station front sprite