BUG: Fixes conversion of vtkIdType
Models with vtk id type attributes would fail to read because we never accounted for them.
Now models with vtk id type attributes will be read in as unsigned long long.
Also a second bug when makeDataArray was called with VTK_UNSIGNED_LONG_LONG it would create a data array of vtkUnsignedLong instead of vtkUnsignedLongLong.
Edited by Andrew Wilson