Added sipsimple.lookup module

Ignore-this: 5533870c9b289904b3b1228b5333ccec

darcs-hash:20090326100226-1e3d8-c23c20743cf9c30f01d9fbf53ff567855e8f39be
sip_session: minor change

darcs-hash:20090326101739-b2873-98f8f7862c54d6b01cd0b8295c661c77820317bc