[PyQt] another pure python signal/slot implementation

[Miguel Turner]

For those interested in using signals and slots outside of PyQt, I've
released my implementation as part of a collection of modules I've found
useful. This implementation can be used in almost the same way as PyQt's
pyqtSignal, though without needing to inherit from a class or specify
signal arguments.

Some supported features are:
* automatic slot disconnection
* dropping excess arguments
* slot return values from emit()
* signaling across threads.

The package is available at: http://code.google.com/p/dhutils/
Comments are welcome.

Miguel