next and last(?) step is kdchart.

Squashed commit of the following:

commit cd61950160fcd19e91d18cecdb3958ce5b5514a5
Author: Inge Wallin <inge@lysator.liu.se>
Date:   Fri Nov 16 00:55:13 2012 +0100

    Move the kdgantt library to a special place for 3rd party libraries.