framework for testing against live dynamodb
attempt [live test]
bump live table throughput and [live test]
don't use tap for live tests [live test]
reuse a single table for [live test]s
Merge pull request #28 from mapbox/live-tests

Live DynamoDB tests
simplify dynamoRequest, add throughput handling
use dynamoRequest for getItem, putItem, updateItem
remove dead item._response function
allow to ReturnConsumedCapacity
tests for throughput throttling [live test]