Merge pull request #51 from gthiruva/patch-1

Patch to the simple_consumer.rb example.

examples/simple_consumer.rb

@@ -48,7 +48,7 @@
 
 # subscribe to queue
 q.subscribe(:consumer_tag => 'testtag1', :timeout => 30) do |msg|
-  puts "#{q.subscription.message_count}: #{msg[:payload]}"
+  puts "#{q.default_consumer.message_count}: #{msg[:payload]}"
 end
 
 # Close client