fix. break larger responses into pieces that can be sequentially pulled off of the queue.  Otherwise the queue blocks indefinitely.
add/mod. response_handler module.  This will handle pulling pending jobs off of the queue and setting putting them in the cache.
mod. response handler / request manager communication.
add. callback handler in request_meta to track actvity of requests.
add. wrap request activity communication in methods.
mv. methods for traversing dictionary nested keys to utils.
mod. set_data and get_data read and write data to a file using pickle.