14 Jun 2010 1.03
* Reverse reaction direction constraints should now work correctly.
* Use the direction constraint "-" to disallow a reaction completely.

19 May 2010 1.02
* KEGG LIGAND parser now skips empty lines correctly
  (works with KEGG LIGAND 17 May version)

10 May 2010 1.01
* Removed references to unused external code