fixed issue when multiple WebSocketClients are used in a process
Merge branch 'multi-ws-clients' of git://github.com/mward/webbit into mward-multi-ws-clients
Attribution
Upgrading Netty from 3.5.2 to 3.6.5 appears to have changed how netty threads behave. There doesn't seem to be a predictable pattern about how threads are created and destroyed. That's unfortunate, but I still prefer to upgrade Netty to deal with other bugfixes such as #104.