[Fix] Rotation angles can no longer be negative
[0.1.13] Camera rotation is now working properly
[0.1.13.1] Add translational speed cap to Camera
[0.1.13.2] Add maximum pitch angle to the camera

Also:
* Reenable rendering optimization
* Update Javadoc for the updatePosition() method, to include the fact
that the method renders the world from the camera's perspective