ftr1: The camera concept has been added.
Last changes:
- vector library is implemented
- quaternion and matrix files have new functions
- the camera is based on the standard approach: direction and up vectors. The
  rotation is made with the quaternion with a predefined step.
Known issues:
- camera pitch and yaw have not been tested and implemented yet
- camera rotation and movement are not smooth
- mouse movement is not implemented
- board has the hole to determine the position of it in space.
Reference:
http://youtu.be/rV1EnNIjF-U