Deleted all the useless MD comments from MTankController, references #20.
Deleted useless Debug.Log call from MTankController, references #20.
Seperated the tank and turret code into nice, fast and modular controllers.

 - tweaked tank movement, especially while rotating
 - created IMovable and IRotatable
 - edited all scripts that relied on MTankController to rely on interfaces
 - edited tank prefabs to use the new controllers
 - fixes #19, though MTankController still exists
 - references #8
Use Input.GetAxisRaw instead of GetKey, fixes #22.
Moved MTankController to UnusedAssets.

The new controllers are now in Assets/Source/Controller.
Merge branch 'master' of github.com:VacuumGames/tunnelers-unified