Distorted Android

More support for using the library from more than one activity

1) Beginnings of support for using the library from more than one activity
2) rename DistortedLibrary.onCreate() to onSurfaceCreated()
3) (rubik) add Cambodia's flag.

We need to pause an Activity in the following way:

1) Activity.onPause()
2) View.onPause()
3) Library.onPause()

otherwise sometimes there are artifacts when pausing!

1) rename DistortedTexture's setColor to setColorARGB
2) fix the Wiind app to take into account paused time
3) fix the Dynamic so that if a single Dynamic is used more than once (in more than one effect) than it doesn't get adjusted for paused time multiple times.

Only compile the Full, Normal & OIT programs when they are actually needed.

Convert Stencil app to the stretch-less API.

Size of the FBO internal to Nodes is now NO MORE taken from the Mesh's stretch values.
Instead, the size is copied from child's FBO size (if there is one) or if the child is a leaf with texture in it (which is sizeless) then we get the default 100x100 ( which means we probably have to explicitly call Node.resizeFBO() )

Fixes for the merge.

Merge branch 'empty-matrix-effects-in-the-center' into modern-empty-matrix-effects-in-the-center

Move the Effects.setStretch to Meshbase.setStretch