[Kst] branches/work/kst/portto4/kst/src/libkstapp

[Brisset, Nicolas]

> Add implementation for ChangeFileDialog.
Thanks :-) That along with the data wizard are the favorite tools
around. We tend to work a lot with multiple files for comparison
purposes, and this makes it good. 
The only problem left is how to add data from multiple sources easily
(see http://bugs.kde.org/show_bug.cgi?id=124942 and
http://bugs.kde.org/show_bug.cgi?id=136780 for the complete background).
But I guess (in fact, hope) that it's coming :-) In any case, mentioning
needs at this stage is certainly better than when things have stabilized
and changes break pre-existing files or APIs...

Nicolas