This is really a work branch now.

This is really a work branch now.
Start the rewrite of the table model and lesson model.
The table now contains all single line things, the other editing will use dock widgets.
Nothing works.
Both models are not editable yet.
Rewrite of the lesson part of the lib - now there is one root lesson containing the world.
Another time crash and burn...

svn path=/branches/work/kdeedu_parley/libkdeedu/; revision=738466