add Version0X class(Refacto-3.0)
This project is supported to socket.io 0.x version from now!!
modify to `socket error Error: write EPIPE`
remove `$this->write(EngineInterface::CLOSE)` in Version0X::close().
modify syntax error : __get() is magic method.
modify syntax error : __get() is magic method to id
modify issue #commitcomment-7531324
add redefined constants of EngineInterface to version 0.x of socket.io.
Merge pull request #62 from kbu1564/refacto-3.0

Support Socket.io 0.x