Assemble/traverse/enrich: complete update for handling self tangencies
Strategies area, within, centroid, transform adapted to new conventions using services
Centroid: removed underscore
Correct: support for open polygons
Get turns: support for open polygons
Sectionalize/segments: support for open polygons
Closing iterator: complete new implementation to support open polygons better
Numpoints: added boolean parameter to add one for open polygons
Within: bugfix for point-on-border-of-interior ring, this needed returning three values -1,0,1 instead of boolean
polygon/ring: added a copy in namespace model:: as agreed long ago, with other default template parameters
