Don't delete objects from SQS until they're actually popped from the out_buffer
Added support for setting VisibilityTimeout
Added garbage collection queue for more responsive pops. And some fixes to visibility timeout, which still isn't quite working right
Fix to visiblity_timeout support
More gracefully shut down the queue with destroy
Updates to the Readme
Readme updates
More readme updates
Added caveats to readme
Readme typo fixed