NetworkReceiver: See if the blocking of the receive-function could create problems

[monsdar]

We're currently blocking the receive function to deserialize and store data. We should check if this is a potential problem. A solution would be to create a incoming data queue which a second thread the deserializes and stores.

See TODO in NetworkReceiver.cpp (currently line 47 and 58)

[monsdar]

This issue is about something else, it is not fixed by the above commit :/