An initial commit for DURACHRON-48:
What is included?

1. A tool for creating and dropping a DynamoDB Audit table and indices.
2. Audit write method
3. Query audit table based on space
4. Query audit table based on space and store
5. Unit tests using amazon dynamodb local.

What is not included?

1. Querying dynamodb for contentId history
2. Querying dynamodb for time ranges.
3. Reading unlimited numbers of log items.