Drop the X11 backend
Completely drops the whole x11 backend.
Still an open question when to merge this but also I have to figure out what is needed to change in CoglRenderer, given that the EGL winsys is not hooked from CoglRenderer side but used as a "base type" on MetaRendererNative.
One of the motivation behind this, is the simplifications this brings to the table when it comes to simplifying the whole CoglWinsys/CoglRenderer situation.
Edited by Bilal Elmoussaoui