Added pj_list_init to sipsimple/core.pxd

Ignore-this: 91db777434ceb3ed7704862fd35f6444

darcs-hash:20090622151425-1e3d8-fd5670684691819613667a5e04a29fc37a571c24
Modified _dict_to_pjsip_param to accept any dict-like object

Ignore-this: 3d8fe8b3cccfff5730a0a9b1cd85bf23

darcs-hash:20090622151447-1e3d8-500a1c150add1390f89b8b82a9a434b7095eedf7