Added support for the 'UpVector' and updated the Listener documentation

https://github.com/LaurentGomila/SFML/commit/50e305277315a6af992e596cb20b2671b50ed775

https://github.com/LaurentGomila/CSFML/commit/6abeaed4aaf44bc0c28501be37c2db0890039360