Compatibility with amqp 0.8.x gem

[jperville]

Hello,

I submitted a few patches to make nanite examples work out-of-the-box using amqp 0.8.x gem.
The pull request is found here : olegshnitko#1

The main difficulty was that using amq.queue() will raise loudly if the parameters passed do not match the ones provided when the queue was first declared.
Since the fork is a bit far from the original project, I post an issue here.

Sincerely,
Julien