GitLab

Bottom-up adjacencies are now computed automatically on-the-fly when adding/deleting
entities. For this only a minimal subset of affected entities is recomputed.

Refactored delete functions and normal attrib class.

git-svn-id: http://www.openvolumemesh.org/svnrepo/OpenVolumeMesh/trunk@169 66977474-1d4b-4f09-8fe9-267525286df2