DynamoDB Storage provider

This is a simple abstraction layer between Amazon's DynamoDB and our local storage interface.

Configuration

To run the tests, create a .env file in the dynamodb directory with the following vars:

AWS_ACCESS=my-access-id
AWS_SECRET=my-access-secret
AWS_REGION=us-east-1
DYNAMO_DB_TABLE=my_test_table

Running Local

Amazon provides a convenient java executable for running a mock DynamoDB server locally. Read all about it here: http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Tools.DynamoDBLocal.html.