upgrade weave script to: a88bb68447, 2014-10-28
a $peer is a destination, not source, on OUTPUT chain; cruft removal
Exec[reset_weave] now notifies Exec[weave_launch], debug unless => attributes
weave reset for Exec[docker_rm_weave_container_for_ensure_(absent|purged)]

New Exec[docker_rmi_weave_image_for_ensure_purged]
make weave script executable
weave::launch now conditionally manages firewall, testing still required
Adds weave::firewall::(docker|weave|listen_to_peer), testing pending
Document the weave::firewall::* classes pending nature, invite testers
Add weave::simple::(run|interface), validate hiera data for weave::(run|interface) types
make release used to update version to v0.7.17