This implemets a step in the kdeui crumble epic.

moves the classes kstatusnotifieritem and knotificationsrestrictions in
the knotifiactions library.

The patch works, but there are still several issues:
* porting from kdebug to qdebug loses the area number
* adds some link libraries: the classes add ki18n, kwidgets and
* KWidgetsAddons
* the test adds ki18n kde4support kdecore
* the KActionCollection becomes a qhash of actions: how should be
* kactioncollections ported?

I guess it should use the qt translation system, and redo the quit
dialog to not usekstandardgui at all?