Solves #388, connection problems with latest faye-websocket version.

[phlegx]

The gem faye-websocket has an example on the github site where it calls ws.rack_response to return an async (non-blocking) Rack response. This pull request does exactly the same for websocket-rails gem.

Tested and working with faye-websocket 0.10.4. Solves issue #388!

# Faye-websocket example
require 'faye/websocket'

App = lambda do |env|
  if Faye::WebSocket.websocket?(env)
    ws = Faye::WebSocket.new(env)

    ws.on :message do |event|
      ws.send(event.data)
    end

    ws.on :close do |event|
      p [:close, event.code, event.reason]
      ws = nil
    end

    # Return async Rack response
    ws.rack_response

  else
    # Normal HTTP request
    [200, {'Content-Type' => 'text/plain'}, ['Hello']]
  end
end

[recurser]

I've been locked on 0.10.0 for months, and this fixes the issue for me 👍

Nice work @phlegx!

[Uelb]

@phlegx You just made my day