code from the Video to the Renderer class.

- removed 24 CR characters
 - removed 1 trailing whitespaces
 - replaced 63 tabs with spaces

internal format is then automatically deduced. Only a few 8-bit RGB
or RGBA formats are supported for now.

with a null argument, and the texture stuff was completely messed up.

texture class refactor.

hardcoded and only the fractal demo uses it, but everything will eventually switch.