update to original repository#1

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rodeger wants to merge 5 commits intorodeger:masterfrom

amjuarez:master

Commits on Aug 31, 2017

Bytecoin v.2.1.1 release
Antonio Juarez
committed

Commits on Oct 10, 2017

Bytecoin v.2.1.2 release
Antonio Juarez
committed

Commits on Feb 13, 2018

Commits on Mar 21, 2018

The last commit
amjuarez
committed