added some core modules that are required for basic
operation:

   account.so   SIP account file parser
   contact.so   Contact list (address book)
   menu.so      Interactive menu

Signed-off-by: Alfred E. Heggestad <aeh@db.org>
[slachta@cesnet.cz: simplified patch]
Signed-off-by: Jiri Slachta <slachta@cesnet.cz>