Graphics Pull 22/9/14

##### Partially completed placeUnit(Unit unit) method.
- The placeUnit method now places units on map squares, however there is
no placement for deployment squares, units placed in deployment squares
will appear in the wrong position.

- Includes a private method for making a Game.Facing enum into a
Quaternion rotation, useful for instantiation of gameobjects.

- Includes minor code cleanup (e.g. variables that were assigned but not
used have been removed)