Work with socket.io2.0

[gzlock]

Test passed. Dev env:

• mac os 10.12.6
• node.js 8.1.2
• socket.io 2.0.3
• unity3d 5.6.2f

[ppz0th]

@gzlock First of all, thanks for your contributions~ you're really helping me in many ways :)

But bad news in that your pull request is not working. I thing that you've fixed a bug in Decoding the packet. So please make new pull request except modifing readme.md. And there's the feature branch - support-socket.io-v2 - which is working on upgrade to socket.io V2. Please set the target remote branch as 'support-socket.io-v2' not 'master'

In socket.io V2, the packet structure is totally changed and we have to implement Encoder and Decoder from the bottom up.

socket.io-client

This link is socket.io-client-Javascript github. In 'lib' folder you can find new rules of encoding and decoding the packet in socket.io V2. (I'm also reviewing this file~)

[gzlock]

@ppz0th I uncommonly used github, this is my first pull request 😂 I just tested the client connected socket.io v2 server success without error , I did not think socket.io changed so much. Sorry about that.

[smallmiro]

@gzlock Please, before changes can be accepted a Contributor Licensing Agreement for Individual | Corporate must be completed

• If you are an individual writing original source code and you're sure you own the intellectual property, then you'll need to sign an Individual CLA
• If you work for a company that wants to allow you to contribute your work, then you'll need to sign a Corporate CLA
• If you are an representative writing original source code, then you'll need to sign a Representative CLA

Thank you your Contribute code!