Add back dev prefix to version string
PARTIAL: Initial high-level API sketching for DynamoDB v2.
PARTIAL: Some initial tests.
PARTIAL: Item fully tested.
PARTIAL: All implemented code now has passing tests.
PARTIAL: Better batch-writing behavior.
PARTIAL: Pulled out fields.
PARTIAL: Applied changes from @jamesls' first round of feedback.
PARTIAL: Added the ResultSet class for nicely iterating over results. Still needs integration.
PARTIAL: Started fleshing out query/scan. Needs testing.
PARTIAL: Tests for building filters passing.
PARTIAL: Tests for private query/scan behavior.
PARTIAL: All but batch get passing unit tests.
PARTIAL: Added integration tests & corrected underlying flaws.
PARTIAL: Batch get implemented.
PARTIAL: Batching & all tests passing.

Needs consistent reads, checksums, retries & docs.
PARTIAL: Made things uglier to accommodate antique editors.
PARTIAL: Shuffling the deck chairs.
PARTIAL: Added consistent read support & revised how ``Item`` tracks modified data.
PARTIAL: The ``ResultSet`` objects no longer cache the results indefinitely.