v1 initial commit

@lanetix/engineers @apolishch - CR Please.  Thanks.
I recommend having the user pass in an instance of an `amqplib` connection that you can then use. otherwise you are limiting which options a user can use when connecting to their amqp provider. as an example, your library would not currently work if the user wanted to use SSL:

https://github.com/squaremo/amqp.node/blob/master/examples/ssl.js