[kde-edu]: Leitner system

[abirvalg at lavabit.com]

Hi, I was thinking about implementing Leitner system
I checked out
http://websvn.kde.org/trunk/KDE/kdeedu/libkdeedu/keduvocdocument/keduvocleitnerbox.cpp?view=markup
and it looks good.
So as I understand it
1. there has to be some config/XML file that contains info from the
previous times LeitnerBox was run in order to restore the state
2. The main functions would be createTable(XMLfile) addEntry removeEntry
promoteEntry demoteEntry, other funcs will be suplementary like keeping
the % score of right vs wrong guesses.
If that's all the lib is expected to do than I wold like to implement it.
Any other stumbling blocks one needs to be aware of?
Thank you.