Protocol handling layer shared as a separate module

[eduardolundgren]

Automattic, the company behind socket.io has separated the protocol from the socket.io framework:

• Protocol - https://github.com/Automattic/engine.io-protocol
• Protocol Implementation - https://github.com/Automattic/engine.io
• Socket.io - https://github.com/Automattic/socket.io

This implementation is by far the best I have found in Java. Since there isn't any active support for socket.io in Vert.x server, besides it uses Netty inside for communication, porting this module could be the best option instead of writing one from scratch. In the worse case scenario, the protocol handling layer could be shared as a separate module, and eventually any Java implementation of socket.io can take advantage of it.

I am starting this conversation to get your guys feedback on that, /cc @IgorSpasic, @rauchg, @mrniko, @purplefox.

[igr]

Some things probably could be stripped, like store package, annotation etc. The idea is to have clean java ScoketIo implementation regardless the transportation layer; so all inputs to this would be wrapped in adapters.