Adds the liblxqtmount include dirs to the build system.

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>
Adapt to the new liblxqtmount portable headers

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>
Merge branch 'pre-qt5'

* pre-qt5:
  Adapt to the new liblxqtmount portable headers
  Adds the liblxqtmount include dirs to the build system.
Use the libqtxdg portable headers

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>
Implements Urgency Hint handling

Makes the panel button blink when the urgency flag is set.
Mode info: http://tronche.com/gui/x/icccm/sec-4.html#s-4.1.2.4