Distorted Android

OIT: something starts working ('Blur' and 'Multiblur' work, 'Triblur' and 'Transparency' do not)

Fix the 'OIT' artefacts.

still debugging the OIT

- remove counting of transparent pixels from main fragment shader
- remove debugs and tidy up
- some fixes for the Mali GPU

Order Independent Transparency: debugging

Order Independent Transparency: some progress

Order Independent Transparency: some progress

Order Independent Transparency. Does not work yet.

Postprocessing buffers mBuffer[] are now shared among all postprocessing operations. This saves a lot of memory, but also means that when doing each particular postprocessing, the textures backing up the mBuffer might be too large. We need to fix two things here: when outputting to those too large textures, we need to adjust the Viewport, and when binding those too large textures as input - we need to adjust the TexCoords to compensate....

SSBO: now we have a more-or-less correct running average of the count of transparent fragments over the last few frames.