Yaybu

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- Workaround a bug in python2.6 that causes certain Amazon S3 operations to
hang.

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- Fixed MANIFEST to include recipes

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- Add new commands for dealing with collections of nodes on cloud providers:
``addnode``, ``rmnode``, ``status`` and ``provision``.

- NB: 0.2.0 is API incompatible with earlier versions

- Mark "static" file content retrieved over a gpg stream as secret to prevent
the content appearing in the logs.

- Depend on yay >= 0.0.57 for latest bug fixes.

- Add a new ``yaybu bootstrap`` to simplify setup on Ubuntu boxes.
If you are running a development build of Yaybu then the bootstrap will be of
the latest code pushed to master on GitHub.

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- Add a new ``Checkout`` provider for use with Vagrant-like environments::

resources.append:
- Checkout:
name: /vagrant
scm: mount

This pattern allows recipes to treat shared folders in VM's (like
``/vagrant``) as checkouts. They can then be upgraded/substituted for git or
subversion checkouts when deploying to a real server.

Any files that are watched in the checkout will be treated as though they
have changed.

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- Fix yaybu.core.shell bug where the communicate implementation waited for file
handles to disappear even when the underlying process had terminated.

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- Restore previous verbosity (will review properly during 0.2.x).