Replace couchbase counters with drb version

lib/qwaiter.rb

@@ -7,6 +7,7 @@ module Qwaiter
   autoload :Counter
   autoload :Broadcaster
   autoload :Couchbase
+  autoload :DrbCounter
 
   def self.broadcast_user(uid, event, data)
     message = {channel: "/user/#{uid}", data: {event: event, data: data}}
@@ -18,4 +19,3 @@ module Qwaiter
     broadcaster.broadcast message
   end
 end
-