Append more to the copyright file

	   2018 Rayan Chikhi, Antoine Limasset, Paul Medvedev

License: Expat

Files: thirdparty/concurrentqueue.h 

       thirdparty/lockbasedqueue.h

       thirdparty/lockstdqueue.h

       thirdparty/lockstdvector.h 

Copyright: 2013-2014 Cameron Desrochers

License: BSD-2-Clause

Files: thirdparty/ThreadPool.h

Copyright: 2012 Jakob Progsch, Václav Zeman

License: zlib/libpng

Files: debian/*

Copyright: 2019 Shayan Doust <hello@shayandoust.me>

License: Expat

License: BSD-2-Clause

 Redistribution and use in source and binary forms, with or without modification, 

 are permitted provided that the following conditions are met:

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    1. Redistributions of source code must retain the above copyright notice, this list 

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    2. Redistributions in binary form must reproduce the above copyright notice, this 

    list of conditions and the following disclaimer in the documentation and/or other 

    materials provided with the distribution.

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 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 

 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 

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 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 

 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 

 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 

 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

License: zlib/libpng

 This software is provided 'as-is', without any express or implied

 warranty. In no event will the authors be held liable for any damages

 arising from the use of this software.

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    2. Altered source versions must be plainly marked as such, and must not be

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 distribution.

License: Expat

 Permission is hereby granted, free of charge, to any person obtaining a copy of 

 this software and associated documentation files (the "Software"), to deal in the