High level APIs

[emarcotte]

I'd like to provide a high level API for talking to rabbit.

Consider:
my $channel = $broker->channel_open();
my $sub = $channel->subscribe(
consume flags here
);
$sub->handler(sub {
my ( $message ) = @_;
# do something with $message
});
...
$sub->recv();
...
$sub->cancel();

I'd like to be able to tie into various callbacks through a API that looks simpler than the raw AMQP method calls.