Log Message:
Update ps2eps to 1.64.

Changes since 1.58:
- Tried to make DSCfilter command more robust
- better detection for files that have a binary heading stuff containing
  even %! as character sequence
- changed year in comment and info printout only
- incorporated changes for Windows/Cygwin detection
- removed surrounding ticks '' for -c $translation in $translatecmd
- removed useless/unsupported 2>&1 in $bboxver for Windows
- fix for two negative offsets in translation