This code is distributed under the terms and conditions of the CCP4 Program
Suite Licence Agreement as 'Part 2' (Annex 2) software. A copy of the CCP4
licence can be obtained by writing to CCP4, Research Complex at Harwell,
Rutherford Appleton Laboratory, Didcot OX11 0FA, UK, or from
http://www.ccp4.ac.uk/ccp4license.php.