lib.jogl - add JOGL as library.
lib.processing - add Processing as library.
praxis.video.render - fix software blending on alpha surfaces.
praxis.video.render - fix finding bounds for external users of RectFill op.
praxis.video - minor fixes to Snapshot.
praxis.video.pgl - first commit of OpenGL pipeline based on Processing GL.
praxis - replace old OpenGL pipeline.