Closes faye/faye-redis-ruby#3

[akelmanson]

No description provided.

[jcoglan]

Thanks for submitting this PR. Since there's no description text here and no further information in the commit, can you explain why this fixes issue #3?

[akelmanson]

When faye-redis is called through an HTTP request, it's wrapped by EventMachine.next_tick (here) but when you publish a message using the client provided by Faye::RackAdapter#get_client, it doesn't use Faye::RackAdapter#handle_request, so it's not wrapped by EventMachine.next_tick. In this case em-hiredis callbacks are not triggered immediately.

My solution is simply wrap every method that use em-hiredis with EM.next_tick.