Serialized UI operations in order to avoid deadlocks

Ignore-this: 76585bb0db339f0bc3b6f08decc68ef5

darcs-hash:20090911141528-1e3d8-89e5f77704079ed4669e9432d2410a89c4fa713f
Added msrp logging capabilities to sipsimple.clients.log.Logger

Ignore-this: ee07ca5ef5b82875306a29754c0707a6

darcs-hash:20090911144416-1e3d8-b181ffcc8eda288888e4072733d3536dd8ae222b