Merge branch 'bug-8078-imagestatistics-planarfigure-offset' into bug-8077-statistics-unit-test
- bug-8078-imagestatistics-planarfigure-offset: introduced new pipeline to create imagemask from PlanarFigure; Build a switch to use two VTK 5.8 classes even when using VTK 5.6 (with VTK 5.8, use the real VTK classes) adding classes from VKT 5.8 needed for statistics calculation removing coordinate-correction to fix offset bug for planarfigure masking