Ploy-ansible

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* Set user in playbook to the one from the config if it's not set already.
[fschulze]

* Change default playbook directory from the aws.conf directory to it's parent.
[fschulze]

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* Added ``playbook`` and ``roles`` config options for instances.
[fschulze]

* Added ``has_playbook`` and ``configure`` methods to instances.
[fschulze]

* Added before/after_ansible_configure hooks.
[fschulze]

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* Use execnet for connections. There is only one ssh connection per host and
it's reused for all commands.
[fschulze]

* Make sure the playbook directory is always absolute.
[fschulze]

* Prevent use of persistent ssh connections, as that easily results in
connections to wrong jails because of the proxying. This makes ansible a lot
slower at the moment.
[fschulze]

* Add support for su and vault (ansible 1.5) as well as ``--force-handlers``
(ansible 1.6).
[fschulze]

* Removed ``ansible`` from install requirements. It won't install in a buildout
so it needs to be installed in a virtualenv or via a system package.
[fschulze]

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* Add ``configure`` command which is a stripped down variant of the
``playbook`` command with assumptions about the location of the yml file.
[fschulze]

* Warn if a playbook is requested for a host that is not configured in the
playbook hosts list.
[fschulze]

* Allow mr.awsome plugins to add ansible variables.
[fschulze]

* Inject the ansible paths sooner as they may not apply in some cases otherwise.
[fschulze]

* Moved setuptools-git from setup.py to .travis.yml, it's only needed for
releases and testing.
[fschulze]

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* Initial release
[fschulze]