exposed status types and related mesh functions

git-svn-id: http://openmesh.org/svnrepo/OpenMesh@1039 fdac6126-5c0c-442c-9429-916003d36597
exposed missing circulator mesh functions

git-svn-id: http://openmesh.org/svnrepo/OpenMesh@1040 fdac6126-5c0c-442c-9429-916003d36597