Distorted Android

Some progress with Effect classes.

Beginnings of support for Effect classes.

Progress with GLOW.

Serious bug sorting Surface's children into postprocessing Buckets detected.

Beginnings of the GLOW unit test.

Properly compute the Halo of a queue of postprocess effects.

Minor.

Still small improvement to FPS

Correct the FPS work (now works even after a Pause() ! )

Move showing FPS in the uppoer-left corner of the Screen to the Library.
App can enable/disable this at any time with a single API call.

Beginnings of support for the GLOW effect.