The BSD 3-Clause License
Copyright (c) 2014 Inria
Author: Nikolaus Hansen, 2008-
Author: Petr Baudis, 2014
Author: Youhei Akimoto, 2016-

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright and
   authors notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
   and authors notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials provided with
   the distribution.

3. Neither the name of the copyright holder nor the names of its
   contributors nor the authors names may be used to endorse or promote
   products derived from this software without specific prior written
   permission.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.