Added temporary notifications for transport state

Ignore-this: a93fbc7cf7ef873d34f14b57de989b01

darcs-hash:20140218130608-56b4d-4f9ae51ef345052a1b1de056037191c1afd2ba3e
Raised core revision

Ignore-this: 7c0362a086970f0d05de18edf1770f7c

darcs-hash:20140218130708-56b4d-367f1c7d5c3d37eb7228d2cc652196dd0355f57d
End session if an unrecoverable error happens in remove_stream

Ignore-this: 5a377b7f8d6b22e53dd66b1733f650a3

darcs-hash:20140219121822-56b4d-59c0f4241cedd58e46fb50706ebc7f45a6becafc