first part of stomp adapter
test the stomp driver on travis
don't use exclusive queues in features
it helps if we enable the stomp plugin on rabbitmq
supply feature file path to eval of test_runner

so that we know what file the code we are evaling came from.

Unfortunately, cucucumber doesn't let us figure out the line that the
evaled code is coming from. We'd have to write the code out to files if
we wanted that.
Fix a typo in a feature description
Add nesty for proper exception chaining
Lock version of bunny gem to 0.9.0.pre10 for now
initial work on connection error handling for stomp adapter