biology/molden: 5.4 -> 5.7

• Adds editable text fields that are longer than the visible string and introduces a new way of selecting a range of amino acids.
• introduces interfaces to the open source packages openbabel and pharmer. Openbabel is used to create 2D images of the molecules in a .sdf file. It is also used to do 2D fingerprint searching. Pharmer is used to pharmacophore (3D) searching against indexed databases of .sdf files.