[PyQt] New-style Signal/Slot Connections Implemented

[Phil Thompson]

For those who want to play...

Current SIP and PyQt4 snapshots implement the new-style API for connecting,
disconnecting and emitting signals described in the Roadmap. I've updated
the 14 tutorial examples to use it, I'll get around to the other examples
later on.

Also, the restrictions on the use of super() have been removed.

Phil