Acknowledgements

Alexander J. Blake	preparation of publication, reading the manual, testing the software
Neil S. Oxtoby	reading the manual, testing and naming the software
Neil R. Champness	support of the original idea, preparation of the publication, testing
Andrei V. Churakov	testing the software for the publication, general testing & advise
Simon J. Teat	testing the software for the publication
Richard I. Cooper	testing the software for the publication & advise