Change of API: move setting the EGL context back to the APP.
Remove old facility to correct Postprocessing buckets on new Postporcessing effects.
New facility will follow shortly....
Bugfixes for the recent 'Effect classes' API change.
Further progress with Apps.
Progress with support for Effect classes.
Progress with GLOW.
Serious bug sorting Surface's children into postprocessing Buckets detected.
Beginnings of the GLOW unit test.