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Ergo version 3.1 release notes, 2011-08-10
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The following changes were made compared to the previous version:

- An option "output_homo_and_lumo_eigenvectors" was added to output
  HOMO and LUMO eigenvectors (orbitals) to a text file. The HOMO/LUMO
  output file is in a format compatible with the Gabedit program.

- Output of dipole moment and Mulliken charges was added. To get
  Mulliken charges, use the option "output_mulliken_pop".

- A new option "use_6_d_functions" was added to make it possible to
  reproduce results from quantum chemistry programs that use six basis
  functions in each d-type shell.

- New options were added to allow representing solvent water molecules
  by a simple point charge distribution. The positions of such extra
  charges are then given in an xyz file using the -c flag at the
  command line, and the charge magnitudes are given using the
  parameters "extra_charges_atom_charge_h" and
  "extra_charges_atom_charge_o".

- Various bugfixes and some code cleanup.