Distorted Android

Add DistortedProgram.stopUsingProgram()

By default, do use Halo Depth (this broke the halo around a solved object in distorted-cube!)

Set possibility for the Postprocessing effects to eclipse the whole object or only work at the edges.

comment.

New BORDER effect.

Comment.

Improvements for the new Border effect. Now works, but covers the object - to be corrected.

New postprocess effect 'Border' (not working yet) and adding it to the testing app 'Triblur'.

Move destroying most of statics from onDestroy() earlier, to onPause().

Reason: doing this in onDestroy() is too late, because when we have two activities, and switch between them, first the ending's Activity onPause() is called, then the starting Activity's onResume, then it's onSurfaceCreated(), then we insert all the effects, and only then the ending Activity onDestroy() gets fired off - and this might destroy the already enabled effects, like for example the Programs of the Postprocessing effects.

Copy constructors for the Statics.