Gaea tutorial Fixes.

Sometimes updates will mean a change in functionality for the tools we use. Gaea in this case had an update that removed rotation from the displacement node. They may add it back in a future patch, but in the meantime for those who want a fast fix for my Desert files you can add transform nodes so it won't change their shape. For issues with the grass colour in grass and rocks, watch the video.
https://www.youtube.com/watch?v=SwznwchwwxU&t