Copyright for python-secretstorage source package in Yangtze V1.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Source: https://pypi.python.org/pypi/SecretStorage

Files: *
Copyright: Copyright 2012-2016 Dmitry Shachnev 
License: BSD-3-clause
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 * Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
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 * Redistributions in binary form must reproduce the above copyright notice,
 this list of conditions and the following disclaimer in the documentation
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 * Neither the name of the author nor the names of its contributors may be
 used to endorse or promote products derived from this software without
 specific prior written permission.
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 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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