Adapted sipsimple.desktopstream to new basic SIP objects

Ignore-this: 1bc714c366ba53c85d0cdb6e64e8c0d7

darcs-hash:20090616100252-1e3d8-4ba35b54693eecb6db170d054a73f5e3e93c658e
Adapted sipsimple.audiostream to new basic SIP objects

Ignore-this: 796c376bacca43d7dd364fe4f4eda651

darcs-hash:20090616100346-1e3d8-aff9fd1a2ff43540417dbb7924021c7349ecba16