Manual merge of branches/KDE/3.5/kdegraphics/kolourpaint/ -r662446:r663466:

Implement rudimentary global session management. It saves the URLs - I'll probably get it to save other things like zoom level later.

Local session save/restore is not implemented, although some psuedo-code exists for it.
I don't intend to implement this since I don't think any other KDE app does.

[FORWARD PORT]

Note: Global session saving crashes KolourPaint and XSM, at least on my build.
I took a shortcut in the build process (timestamp-touched kpMainWindow.h so that I could override readProperties() and saveProperties() without a full rebuild) so this might be to blame.

But if this is not the case, it's a null ptr deref in KMWSessionManager::commitData().
Next time I update from kdelibs and do a clean build, I'll test again.