- Set spacing and AMRBox separately.
- Expose APIs on vtkAMRInformation on vtkOverlappingAMR
- Add printing and auditing routines for better debugging support
- Fix bug in AMRSliceFilter and add test
- Simplify vtkOverlappingAMR initialization
- change vtkOverlappingAMR:SetGridSpacing to vtkOverlappingAMR:SetSpacing

Change-Id: I4ea8497192bc8c0dcda3a5a3726051342a3d48f5