Fixed both analyze.sh and top50.pl scripts.

  [analyze.sh]
  * Made the entries in the msd-sorted.txt file sorted.
  * Used msd.txt file as input for top50.pl. The current pattern in top50.pl
    does not match data from the msd-sorted.txt file.
  * Allowed the top1000 report to report the first 1000 ranks by passing
    *-n 1000* to top50.pl. Set to 50 by default.

  [top50.pl]
  * Fixed the error message when a line from stdin does not match the pattern.

git-svn-id: svn://svn.debian.org/pgp-tools/trunk@422 b513b33f-fedd-0310-b452-c3deb5f4c849