* training: added render-to-texture example.
* training: started to test render on texture
* training: render to texture obtained: continuosly.
* training: render to texture "one shot" resolved.
* training: render on texture nearly done: todo find texture transforms.
* training: render to texture completed.
* Ely: ely: started to integrate render to texture.
* training: render to texture first attempt.
* training: render to texture completed.
* Ely: ely: first attempt to integrate render to texture.
*Ely: ely: render on terrain doesn't work! Try with  a plane.
* Ely: ely: render to texture integration successful.
*Ely: ely: merged branch 'render-to-texture' into master.