Make sure convex objects remain convex as Nef polyhedrons
Faster minkowski()
Change minkowski 3d png test result from green -> yellow facets
Remove some c++11-syntax
Minkowski bugfix: Multi-convex shell polyhedra were incorrectly classified as convex
Make Nef -> OpenGL conversion aware of face orientations allowing (but not enabling) Nef renderer to mark in purple or cull backfaces
Fix half of #495: Exported facets get correct orientation
Fix second half of #495: Nef with holes get imported correctly (CGAL Bug)
Fix build on Travis
Merge branch 'master' into minkowski-speedup
Updated expected file for #495
Added testcase for erosions issue