Modified Registration to also send SCRegistrationDidSucceed at refreshes

Ignore-this: 481c72451131fae034960172ee3473a2

darcs-hash:20090327112730-1e3d8-798096b645e8d072f40c35f297388eb29040e2dd
Adapted sip_audio_session to use the modified Logger

Ignore-this: a31e18c08b4a43f688edc9cf8aec51ae

darcs-hash:20090327120544-1e3d8-012165400e8b7db776340f77bff69eaafa3e75d3