Copyright for libbase58 source package in Bionic

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: libbase58
Upstream-Contact: Luke Dashjr 
Source: https://github.com/luke-jr/libbase58

Files: *
Copyright: 2012-2014 Luke Dashjr 
License: Expat

Files: autogen.sh
Copyright: not-applicable
License: CC0-1.0

Files: debian/*
Copyright: 2014 Dmitry Smirnov 
License: Expat
Comment:
 Re-licensing as (L)GPL_2+ family of copyleft licenses is permitted.

License: Expat
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Comment:
 This license also known as "MIT/X11 (BSD like)" or "MIT" however FSF
 consider "MIT" labelling ambiguous and copyright-format specification
 recommend to label such license as "Expat".

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