Log Message:
Update tex-lm and tex-lm-doc to 2.004.

Changes:
    * a bug in *lssq.fd files corrected (thanks to Heiko Oberdiek);
      fonts were not touched, only the time stamp changed
    * malformed `Euro' sign in oblique fonts corrected (thanks to
      G\"unter Spahlinger)
    * LaTeX *.fd files improved (better substitutions for unavailable
      variants)
    * shapes of LM glyps consistent with D.E. Knuth's recent changes in
      CMs plus lots of tiny changes