Improve support for CP932 (Windows Japanese).
Improve support for CP932 (Windows Japanese).

This adds characters that are beyond the normal range of shift-jis,
and adds the NEC characters that supplement JIS X 0208.  However, note
that this JIS X 0208 table has slightly different forms of some
characters than CP932.

dgobbi/vtk-dicom,dgobbi/vtk-dicom,dgobbi/vtk-dicom