fixed crash for check surface consitancy
automatic symmetry plane generation works for simple cases
improved plane filling to handle more cases
improved output
started export function for DrNUM
export volumes as cellZones
Delaunay threshold and verbose mode
Delaunay threshold
fixed problem with distorted edges
started support for external hex "core" grids
moved to NETGEN-5.1-RC
first step to handle polyhedral cells directly inside enGrid
3 different transfer types for Octree to vtkUnstructuredGrid
 1. hanging nodes
 2. conformal grid with pyramids and tets
 3. polyhedral cells (a bit like hanging nodes)
3 different transfer types for Octree to vtkUnstructuredGrid
 1. hanging nodes
 2. conforming grid with pyramids and tets
 3. polyhedral cells (a bit like hanging nodes)
adapted to polyhedral cells
vtkUnstructuredGrid::Reset() has to be called if the mesh is resized
or re-allocated. This is done automatically inside allocateGrid
the octree is now transferred as grid with polydral cells
more than 1 cell allowed on top level now
top level resolution and better parameter suggestions
hex-core and triangulated surfaces working (next step is the tet mesh)
movibg back to 4.9 for now; 5.1RC segfaults...