Added TraceSIPValue type for --trace-sip option in sipsimple.clients

darcs-hash:20090213234535-1e3d8-877e29a57ecd835f541a3a2ec7e975bb9984b947
Modified sipsimple.clients.log to allow logging to stdout

darcs-hash:20090213234625-1e3d8-8d8c7d6f348a5dd04a5510f8218b883cd5430c3a