Change way that async_post() works to (hopefully) handle RequestLimitExceeded errors in a way that works
Merge pull request #22 from lkinley/master

Updates/fixes
remove extraneous debug warning
implement exponential backoff for RequestLimitExceeded
properly report connection errors generated by AnyEvent::HTTP
remove registration for functions in elastic_network_interface.pm that are in private_ip.pm
unimplemented new api calls in reserved_instance.pm
bugfix for async_post(): on_max_retries value needs to be coderef