Version 0.2.1
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* New program ``greylag-reannotate`` takes a set of SQT files and a FASTA
  database and reannotates the found peptides as if the search had been done
  against the specified database.  (This is usually much faster than redoing
  the search.)

  This command will work on SQT files produced by greylag or SEQUEST, and
  fixes some truncation problems in loci generated by the latter.  It also
  produces better flanking residues and handles isobaric residues more
  correctly.

* ``greylag-validate --prefer-closer-mass`` now has better charge alias
  handling.

* ``maximum_missed_cleavage_sites`` now defaults to 1.

* Carriage return characters in ms2 files are now handled better.