assertEquals() for ChannelBuffer with UTF-8 decoded output added
ObserveOption sync between ObservableHandler and MessageRetransmitter
Adapt MAX_RETRANSMIT for Observe-Notifications

Timeout notification should occur after MAX-AGE ends
http://tools.ietf.org/html/draft-ietf-core-observe-06#page-13
Send last 404-Msg to observers when service gets removed