Work around pyside.Signal's unhashable type bug

[nirizr]

pyside.Signal doesn't natively support working with complex objects as signal callables. Often wrapping the callback with a lambda does work.

This should be transparently addressed by replacing pyside's connect method with one that will wrap the callback in a lambda and then call the original callback.

However, since PySide.Signal is not a python class, replacing it's method seems a bit harder than anticipated.