Log Message:
Update dvipdfmx to 20130405

Changes:
    - Default is not to cache image files.
    - back to using -dEPSCrop instead of -sPAPERSIZE=a0, in conjunction with
      changes to dvipdfmx.def and xetex.def.
    - speed up inclusion of eps figures.
    - Make sure CMapName of embedded CMaps does not contain slashes.
    - support large truetype fonts which are strictly speaking out of spec,
      idx > 32767.