Kdesupport is replaced by a dbus only package. Qt is updated
so the Pkgconfig files have to be updated accordingly.

* src/QtCore.pc, src/QtGui.pc: Update to qt 4.8.4
* src/inst-kdesupport.nsi, src/uninst-kdesupport.nsi: Renamed to
dbus.
* src/Makefile.am: Remove workarounds for the kdesupport package
that are no longer neccessary.