Added missing import in sipsimple.applications.rpid

Ignore-this: 888679c855c684f80fe43e5aed3772b9

darcs-hash:20090329234319-1e3d8-9726e47a51141e8c4a2253972ef8ccc9abe53581
Fixed typos in sipsimple.applications.rpid

Ignore-this: 4d98b0a34b7f37935ffa326936fcb035

darcs-hash:20090329234333-1e3d8-0d98a7b12c8c4471229bcfa2d32002fffd9ff6d0