up-version.sh: Removed the update of version itno the README
up-version.sh: Replaces Unshare.pm with Setns.pm (as the script was borrowed from Linux::Unshare module ;)
Added a check to the version string that is provided
README: removed version information from here since it does not make sence in this file
Added copyright notice on the top of the file as it is required by Perl distribution standard.
META.yml: Added repository and lincense links
- Updated the version to 0.04
lib/Linux/Setns.pm: Updated the version because of changes in the META.yml and README files