Factor parsing of response structured data info dedicated function to
ease later processing of multiple responses from a batch request
response.
Add API batch request functionality, and documentation describing it.
Automatically accept queued versions of the existing API methods, along
with a processing method to handle sending the requests and processing
all the responses in turn.
Fix lowercasing of keys from send_queued_requests
Merge pull request #8 from kbenson/master

Allow batch requests