Created parent interface for messages and frames
Created Hixie Connection
Applied updated interfaces to Hixie versions
Removed __toString on msgs/frames since there could be 2-3 types returned
Updated deps; React Socket notify client of shutdown
Separated core interfaces into many
Removed initial version support out of handshake negotiator
Moved message parser responsibility to each version
Removed __toString method from MessageInterface as to not confuse message from payload
Support for RFC control frames
Support message concatenation
[BCB] (temporary) WsConnection hard coded to RFC version
Handshake checks for \r\n\r\n anywhere, not just at end of string
Moving forward we're going to assume `mbstring.func_overload` is off.
For that reason we're not going to call `mb_` functions when checking byte level strings.
Separated handshake negotiation into its own class
`HandshakeNegotiator` deals with Request/Response classes
These changes are geared towards separate responsibility
Refs #29
Updated RFC6455 handshaker to check values case insensitively
Made sure RFC6455 handshaker matches encoding properly
Added mbstring as a requirement for Ratchet
Refs #28, #30
Updated how Ratchet handles WebSocket sub-protocols
Broke out WsServerInterface to not extend MessageInterface;
Components will instead use Interface segregation principle
WAMP is now able to work without the developer having to
manually enable the WAMP sub-protocol
