Potential fix on fibre yield error.

See websocket-rails#231. We force the channel token hash fetching to
use ruby_redis.
Adding connection hired is

Adding connection hiredis into the required list and changing channel
tokens back.
Changing event machine sync from next_tick to defer

defer seems to resolve the issue faced.
Adding debug flags

Adding some debug flags to really see what’s going on.
Merge remote-tracking branch 'invention_lab/master' into updating_websocket_rails