Added mouse look-around, but camera transforms need minor touch-ups.

Signed-off-by: martingronlund <martingronlund@live.se>
Added the obligatory minor fix (I never learn)

Signed-off-by: martingronlund <martingronlund@live.se>
Added initialization guards for SoundManager and InputManager and refactored all InputManager variables to not use m_-prefix, since they were all static.

Signed-off-by: martingronlund <martingronlund@live.se>