msrplib: added MSRPConnector, high-level API to set up MSRP

darcs-hash:20081127153350-b2873-f21dc324eeab1a4c52a6f9c0fbae4419f1e73bf7
minor fix: made enginelogger works when console is not enabled

darcs-hash:20081127153425-b2873-754822941b9e29b65e448d113c53afbde74ba2ef