refs #7252. Algorithm template.
refs #7252. Read metadata into md histoworkspace.
refs #7252. Properties to specify vtkDataArray names
refs #7252. And Import the data too.
refs #7252. Reporting and test updates.
refs #7252. Fix OpenMP loop on windows.
refs #7252. Add predicted size check.
refs #7252. Further fix memory issues.
Merge remote-tracking branch 'origin/feature/7252_load_vtk_histo'