The NetworkManager now has more mature flow-control which means that we
send our buffers more regularly and we delay parsing received data if the
sending takes too long.
The direct effect should be that creating of a large number of messages
in response to incoming messages is no longer a problem in many cases.
This adds all the header ints to chunked messages, solving the problem
of losing RequestId on roundtrips if the answer was too big.
Added a unit test for this "new" features.
This makes callbacks all use shared_from_this() in order to avoid
callbacks being done on deleted instances (thanks boost!).
Last, special case when the user doesn't connect but just sends messages
which caused a send of data, only to realize the connection wasn't open,
and then a connect.
This makes sure we immediately start a connect on queue of a message.
John Galt
tomFlowee