BUG: 2D images were not being loaded correctly since we didn't handle the XDMF_GEOMETRY_ORIGIN_DXDY geometry type. Fixed that.
BUG: 2D images were not being loaded correctly since we didn't handle the
XDMF_GEOMETRY_ORIGIN_DXDY geometry type. Fixed that.

cjh1/Xdmf2,cjh1/Xdmf2,cjh1/Xdmf2