The python shelve mod­ule is too lim­it­ing for the data­base needs of KRsN, so I'm mov­ing it to SQLite and PySQLite.

While this adds an­oth­er de­pen­den­cy, it's a small one, and the cod­ing be­comes way sim­pler. So, I'm do­ing it, be­cause fight­ing against the tools is fool­ish, and shelve was not do­ing it with­out a fight :-)