add Net::Docker CPAN module

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)

docs/sources/reference/api/remote_api_client_libraries.rst

@@ -45,3 +45,5 @@ and we will add the libraries here.
 +----------------------+----------------+--------------------------------------------+----------+
 | PHP                  | Docker-PHP     | http://stage1.github.io/docker-php/        | Active   |
 +----------------------+----------------+--------------------------------------------+----------+
+| Perl                 | Net::Docker    | https://metacpan.org/pod/Net::Docker       | Active   |
++----------------------+----------------+--------------------------------------------+----------+