v0.5.0

Added Postgres storage, reworked API, upgraded MongoDB driver to major 3.

v0.4.0

Added MongoDB as an alternative storage to Amazon DynamoDB.

v0.3.0

Automatic creation of database tables.

v0.2.0

Made the context argument available to the completion handler.

v0.1.0

First release of the stream-friendly, DynamoDB-backed ScatterGatherGateway.