docker: update to docker-py 0.3.0, plus full port binding support, container names, links
docker: add 'version_added' to the appropriate documentation entries
Copy Module: Add the ability to set directory attributes on recursive copy.

Closes GH-6194.

These changes pass attribute modifications through to new directories during a recursive copy with an addition allowing for the directory mode to be set independantly.
Merge pull request #6171 from joshuaconner/update_to_docker-py_0.3.0

docker: update to docker-py 0.3.0, plus full port binding support etc. from #5639
Update changelog for new yum module behavior
Add changelog note for docker-py 0.3.0
Add note about ansible-vault to the changelog
copy module: cleanup and if directory_mode not set default to umask
Minor cleanup.
Merge pull request #6218 from risaacson/issues_6194

Copy Module: Add the ability to set directory attributes on recursive copy.