This module implements a protocol for generating atomic structures of complexes
with cyclic symmetry (such as rings), using only the atomic structure of a
single subunit and a cryo-electron microscopy density map of the complex.
See the IMP::multifit module for a similar protocol for handling non-symmetric
complexes.

Generally, this module is not used directly; instead, the
[cnmultifit.py application](@ref IMP_cnmultifit_tools_overview) is used.

_Author(s)_: Keren Lasker

_License_: [LGPL](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

_Publications_:
 - Keren Lasker, Maya Topf, Andrej Sali, Haim J. Wolfson, \quote{Inferential optimization for simultaneous fitting of multiple components into a cryoEM map of their assembly}, <em>Journal of Molecular Biology</em>, 2009.