[/ Copyright Oliver Kowalke 2014. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt ] [section:acknowledgements Acknowledgments] I'd like to thank Alex Hagen-Zanker, Christopher Kormanyos, Conrad Poelman, Eugene Yakubovich, Giovanni Piero Deretta, Hartmut Kaiser, Jeffrey Lee Hellrung, [*Nat Goodspeed], Robert Stewart, Vicente J. Botet Escriba and Yuriy Krasnoschek. Especially Eugene Yakubovich, Giovanni Piero Deretta and Vicente J. Botet Escriba contributed many good ideas during the review. [endsect]