Bug 801: Elaborate on multisampling performance/quality: Flipquad, RGSS, Quincunx

Using poles only as sampling points is not as effective as: flipquad > rgss >> quincunx

Best quality would be 'wholeedge', i.e. average every supersample,
however performance is worse here.

References:
  <http://fileadmin.cs.lth.se/graphics/research/papers/inexp_ms2005/>
  <http://fileadmin.cs.lth.se/graphics/research/papers/masses2003/>
ShaderCode: Allow 'srcRoot' to be optional ; RegionRendererImpl01: Allos custom shader
TypecastRenderer: Validate Shape Generation - Result: OK
Bug 801: Use allsamples 'brute force' for VBAA (best quality) ; Demos: Reduce text contrast by 1/10th allowing better AA ; GPUUISceneGLListener0A uses proportional window height font size and one label w/ 10pt