Normalize signal & slot signatures in connection

Profiling shows Qt Creator spends 2% of its load time normalizing

Change-Id: Id7ba78038c8504d960172923026245d28de182e8
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Disable build for WinRT

Change-Id: I9539aed1011325e201d7e32ea02b8c3fee77af30
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>