Distorted Android

Revert "Convert next 4 APPs to the new Matrix effects."

This reverts commit d28acefad49451b502424dae12ec8a985007de86.

revert the recent Marix Effects work.

Convert next 4 APPs to the new Matrix effects.

Minor.

Major refactoring: convert the Matrix Effects to be independent of the resolution of the surface we render to.

Re-write the first 15 apps to work with this.

Minor

Bugfix: create the Postprocessing buffer immediately.

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.