WebSocket refactor

[WAMP] [BCB] Publishing

BC break: Updated the `WampServerInterface` to have a strict API
Exclude and Eligible are now always arrays acting like black/white list
Changed `uri` to `topic` to be more generic with Pub/Sub
Added unit tests for `onPublish`

Most bug fixes

Merge pull request ratchetphp#24 from cboden/socket-server

v0.1RC1