Blinker

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Released 2013-07-03

- The global signal stash behind ``signal()`` is now backed by a
regular name-to-``Signal`` dictionary. Previously, weak references
were held in the mapping and ephermal usage in code like
``signal('foo').connect(...)`` could have surprising program
behavior depending on import order of modules.
- ``Namespace`` is now built on a regular dict. Use ``WeakNamespace``
for the older, weak-referencing behavior.
- ``Signal.connect('text-sender')`` uses an alterate hashing strategy
to avoid sharp edges in text identity.

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Released 2011-10-26

- Added ``Signal.receiver_connected`` and
``Signal.receiver_disconnected`` per-``Signal`` signals.
- Deprecated the global ``receiver_connected`` signal.
- Verified Python 3.2 support, no changes needed.

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Released 2010-07-21

- Added ``signal.connect_via(sender)`` decorator
- Added ``signal.connected_to`` shorthand name for the
``temporarily_connected_to`` context manager.

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Released 2010-03-28

- Python 3.0 and 3.1 compatibility.

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Released 2010-02-26

- Added ``Signal.temporarily_connected_to`` context manager.
- Docs! Sphinx docs, project web site.

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Released 2010-02-14

- Initial release.
- Extracted from ``flatland.util.signals``.
- Added Python 2.4 compatibility.
- Added nearly functional Python 3.1 compatibility. Everything except
connecting to instance methods seems to work.