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
Move the 'pre-multiply mesh before applying any effects' thing from [(Xsize of texture, Ysize of texture) x Mesh's zFactor] to Effects.setStretch(sx,sy,sz)
Rename MeshFlat MeshRectangles.
Invert the order of Matrix Effects. Now, just as in the other queues, the first matrix effect is actually the first to act on the object - not the other way around!
Correct the Legal notice.
Rename all the classes that are not exported to application to 'Internal'
Fix several more apps for the 'center-of-matrix-effects-in-screen-center' change.
Fully move the Meshes to their own package.
'PostprocessTree' app: enable the point: double blur.
'PostprocessTree' app: icon
Improve the 'PostprocessTree' app. Shows bugs in postprocessing.
New 'PostprocessTree' app (unfinished)