This document was based on a document written by Bob Withers, [email protected].
Additional information taken from documents written by Georg Rehfeld, [email protected] and David Mansfield, [email protected].
Additional proof reading done by Bob Withers, Mark Watling, [email protected], Peter Sodhi, [email protected] and Greg Hankins, [email protected].
My thanks go to the tremendous support from all the people involved in this document and the research that has gone into it. Particular thanks to Bob Withers and Mark Watling for the additional comments and help they have provided.