------------------
* Always set ``ansible_ssh_user`` in inventory.
[fschulze]
* Clear host and pattern cache after calling original Inventory.__init__ method.
[fschulze]
* Add ``--extra-vars`` option to ``configure`` command.
[witsch (Andreas Zeidler)]
* Provide ploy_crypted lookup plugin to load encrypted files into Ansible
variables. Only ascii and utf8 encoded files will work.
[fschulze]
* Expand Ansible variables in get_ansible_variables method.
[fschulze]
* Support Ansible vault with safe key storage via keyring library, so you don't
have to type it in or have it in an unprotected file.
[fschulze]