Ensure ruby uses top-level WebSocket constant in client.rb. Provides em-websocket compatibility.

[DanKnox]

This commit enables compatibility with the em-websocket server gem.

The em-websocket gem adds a WebSocket module under the EventMachine namespace. The client.rb file references the WebSocket constant while executing within the EventMachine namespace. Once em-websocket is required, client.rb begins using the WebSocket module provided by the em-websocket gem instead of the correct top-level constant that it expects, resulting in undefined method exceptions.

[imanel]

Thanks - released as version 1.0.1 bugfix