removed trailing _main from pvd file, using segment names for filenames
setting segment names in copy operation
name fixed (setting segment name to itself does nothing, appending _already_in_use to segment name if name is already in use)
Merge branch 'FlorianRudolf/feature-VTK-segment_names' into next
Merge branch 'FlorianRudolf/feature-circumcenter-points' into next
Merge branch 'FlorianRudolf/fix-named-segments' into next
Merge branch 'next' of github.com:viennagrid/viennagrid-dev into next
bugfix for hexahedrons (a hexahedron has 8 points, not 6 *facepalm*)
Merge branch 'FlorianRudolf/feature-circumcenter-points' into next