Update IPaddr/MAC filter plugins

IP address, network and HW/MAC address filter plugins have been changed
to use Python netaddr library instead of implementing all logic on their
own. Because of that, DebOps roles and playbooks which use these filters
will now require 'python-netaddr' package installed on the Ansible
Controller host (remote hosts don't need it).
Merge pull request #23 from drybjed/new-filters

Update IPaddr/MAC filter plugins