Added thread attribute to SIPApplication as the Thread the reactor runs in

Ignore-this: 13630f89d2ff02dc5591e7c819524a1d

darcs-hash:20100705104034-1e3d8-41cb5be30cec7dce848a460ea08f16c6ad2f9bac
Improved synchronization of the audio devices with corresponding entries

Ignore-this: b979d326cee9f342972f09a8bed20abb

darcs-hash:20100705104037-1e3d8-a7bdc8c9a396625e11c1316566fdf14a2cf9bc61