Add field data to vtkUniformGrid to save GDALDataset NoDataValue
Add field data to vtkUniformGrid to save GDALDataset NoDataValue

For use by downstream processes.
One double value is stored for each raster band.

keithroe/vtkoptix,sumedhasingla/VTK,jmerkow/VTK,SimVascular/VTK,gram526/VTK,mspark93/VTK,sankhesh/VTK,jmerkow/VTK,mspark93/VTK,jmerkow/VTK,SimVascular/VTK,SimVascular/VTK,sankhesh/VTK,sumedhasingla/VTK,jmerkow/VTK,gram526/VTK,sankhesh/VTK,sumedhasingla/VTK,sumedhasingla/VTK,mspark93/VTK,SimVascular/VTK,sankhesh/VTK,keithroe/vtkoptix,msmolens/VTK,msmolens/VTK,msmolens/VTK,jmerkow/VTK,jmerkow/VTK,mspark93/VTK,gram526/VTK,mspark93/VTK,keithroe/vtkoptix,mspark93/VTK,msmolens/VTK,mspark93/VTK,sankhesh/VTK,msmolens/VTK,gram526/VTK,keithroe/vtkoptix,keithroe/vtkoptix,keithroe/vtkoptix,keithroe/vtkoptix,msmolens/VTK,SimVascular/VTK,msmolens/VTK,SimVascular/VTK,SimVascular/VTK,gram526/VTK,sankhesh/VTK,keithroe/vtkoptix,sankhesh/VTK,msmolens/VTK,sankhesh/VTK,sumedhasingla/VTK,sumedhasingla/VTK,jmerkow/VTK,jmerkow/VTK,sumedhasingla/VTK,SimVascular/VTK,gram526/VTK,gram526/VTK,mspark93/VTK,gram526/VTK,sumedhasingla/VTK