Adding a test for array headers.
Merge branch 'master' of https://github.com/manchicken/net-amqp-rabbitmq into array_types_in_headers
Adding support for array headers, first go.
Added function for adding array types to structures, also added support for those arrays in the hash table function which already existed.
Publish now sends arrays it looks like.
Got arrays working in receiving a message. Next up? Tables.
Finished code changes for issue #18.

We can now handle nested complex structures in RabbitMQ headers without
hassle.