* Return actual queue attributes with result
Previously this was only returning the desired queue attributes, and not even returning the QueueARN for use elsewhere. Now it will return "results.attributes" that is retrieved with boto's get_queue_attributes().
* update return structure to reflect current SQS config; add documentation of return values
* Remove redundancy from if/else statement
* Add SQS queue policy attachment functionality
SQS queue has no attribute 'Policy' until one is attached, so this special
case must be handled uniquely
SQS queue Policy can now be passed in as json
