Claviger

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- Do not present configuration file errors as unhandled exceptions.

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- Add missing dependency to jsonschema. (Thanks-to: Joost Rijneveld)
- Properly decode output of `scp`. (Thanks-to: Joost Rijneveld)

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- Add ``allow``-list to server stanza.

If ``keepOtherKeys`` is set to false, claviger will remove any keys present
except for those in the ``present`` and ``allow`` list.
- Add *abstract servers*. Let every server inherit from the hidden
abstract server ``$default``.
- Allow

.. code:: yaml

servers:
server1:
server2:

which is prettier than

.. code:: yaml

servers:
server1: {}
server2: {}

- bugfix: actually set server name with ``name`` option.

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- Show the correct number of keys actually removed.

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- Some cosmetic changes.
- Show example configuration file, if claviger isn't configured yet.
- Python 3 compatibility.

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- Initial release.