Improve tree update procedure in NetworkSimplex
The new method updates a smaller subtree (fixing a bug) and shifting the
potentials with a costant value.

 lemon (0.5-1) unstable; urgency=low

   * Initial Release.

  -- LEMON Development Team <etik-ol@cs.elte.hu>  Tue, 14 Jun 2005 08:29:34 +0200