//
//   <one line to give the program's name and a brief idea of what it does.>
//   Copyright (C) <year>  <name of author>
//
//   This code is distributed under the terms and conditions of the
//   CCP4 licence agreement as `Part 1' (Annex 2) software.
//   A copy of the CCP4 licence can be obtained by writing to the
//   CCP4 Secretary, Daresbury Laboratory, Warrington WA4 4AD, UK.
//