[release] popen() fixes to reap zombies, filtered logging uses info severity
[release] wait_on_group method arg instead of using ruby version
[release] requeue on unsubscribe, fresh consumer on resume w/ cleanup
[release] need to reset amqp channel qos prefetch on reconnect
[release] 0.9.9
Merge pull request #440 from portertech/release

Release (0.9.9) final bug fixes and adjustments
updated changelog, 0.9.9 release