Ploy-ezjail

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* Add ``get_fingerprints`` to support host keys with all key types.
[fschulze]

* Fix jail host ``status`` command for various cases.
[fschulze]

* Output stdout in addition to stderr on various errors. This let's one see
additional debug info when jails don't start.
[fschulze]

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* Allow setting the jail name via ``ezjail-name`` instead of using the instance
id as the default.
[fschulze]

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* Improved error handling with useful error messages instead of tracebacks.
[fschulze]

* Allow setting startup order of jails.
[tomster]

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* Use new ``Executor`` helper from ploy 1.2.0 which handles ssh agent forwarding.
[fschulze]

* Enable "local mode" where if the ``instance`` option is empty all commands
are executed locally.
[fschulze]

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* Print status of all jails when requesting status of master.
[fschulze]

* Check jail status before trying to connect.
[fschulze]

* Use new helper in ploy 1.0.2 to setup proxycommand.
[fschulze]

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* Added documentation.
[fschulze]