Changed session storage to use a SQL database

Added

• Added support for session_store_type = "sql" by creating a database. The default is "sql".

Note: this is a transitional release. It retains the elasticache resources so the change can be done with minimal downtime.

Separate AWS credentials for Dynamodb

Added

• Create Dyanomdb user, with IAM permissions and credentials
• AWS tags
• Example usage

Initial Release

Merge pull request #2 from silinternational/develop

Initial release