Renamed 'name' and 'exchange' arguments of bind_queue and unbind_queue
to 'source' and 'destination' to concur with bind_exchange and
unbind_exchange.

Renamed the 'header' argument of publish to 'headers'.

Added and 'arguments' argument to bind_queue to allow configuration of
headers exchange bindings.

Added MANIFEST.
Added Data::Dump to dependencies.
Added warning of unused arguments to method calls.
Merge pull request #4 from keithj/devel

API changes for consistency and support of message headers