Update README.md

updated link to the Changelog of the master branch instead of nsenter
Merge pull request #142 from andreamtp/patch-1

Update README.md
Merge pull request #1 from phusion/master

atualização do ramo principal
Merge pull request #2 from pablobs/debian-sid

atualização do ramo principal
Merge pull request #3 from pablobs/master

atualização do ramo principal