Distorted Android

1) bugfix computing Gaussian BLUR kernel (for odd radii, the last offset was incorrectly computed)
2) introduce more advanced method of detecting BLUR halo (compute depths in a new way)

Roll back the recent MIPMAP work.

Preliminary support for MIPMAP levels of the postprocessing buffers. (doesn't work yet)

Node: Sort children IDs when generating their list for the Map of (List<Children IDs>,NodeData).
This makes two internal nodes with the same children always isomorphic, no matter what is their order.

Release all TREE FBOs in Distorted.onPause().

Major:

1) in the Library, fix the fact that some applications (those that were creating their DistortedSurface objects outside of onSurfaceCreated or onSurfaceChanged) would not render after the activity went to background (press POWER to see that).
2) in the Apps, call the new 'Distorted.onPause()' API to fix the above problem...

Reset EffectsPostprocess' ID back in 0 on Destroy.

Children now properly sorted into Postprocessing Buckets.

Messing around with the AttachDaemon (from now on a more generic DistortedMaster).

In preparation for thr SORT job that will let us sort the children Nodes into postprocessing Buckets.

Actually implement proper postprocessing Buckets.

Bugfix (before we couldn't call postprocess() more than once per frame)

Separate the Postprocessing Effects to their own DistortedEffectsPostprocess queue.
This partly breaks Multiblur (to be debugged)

Minor.

Move the Postprocessing buffers to OutputSurface.

When detaching Nodes, do make sure we also cancel any ATTACH jobs that might be pending.

Minor.

Improve Projection.

Bugfix - POSTPROCESSING FBOs weren't properly released!

Merging blurred surfaces mostly ok now (blurred image still appears a bit shifted down for some reason)

Bugfix (samplers need to be sent to shaders as INTEGER Uniform

Simplify shaders.

It now automatically chooses OpenGL ES 2.0 and GLSL 100 or OpenGL ES 3.0 and GLSL 300.

Postprocessing effects will not work on OpenGL ES 2.0 contexts.

Make it more flexible; now it can run almost all apps on OpenGL 2.0 contexts; OpenGL 3.0 ( with GLSL 3.00) required for POSTPROCESSING.

Upgrade from GLSL 1.00 to GLSL 3.00 ES
Introduce separate BLUR1 and BLUR2 shaders, the second one marging (writing to gl_FragDepth still does not work)

Simplify BLUR shader.