for sailthru/sailthru-python-client#40 to better check the json where needed
The send_response or blast_response is a SailthruReponse - which already deserializes the json coming back from the server, so get_body returns the deserialized object.  Check instead the object is None if there was a problem and fail out.
add checking to see i 'error' is in the json keys
Merge pull request #41 from dherbst/dh_40

for sailthru/sailthru-python-client#40 to better check the json where ne...