Updated DynamoDB APIs
Introduced Policy wrapper
Split up files
Changed dynanodb to dynamodbv2
Updated readme
Let Credentials.defaultEnv throw Exception when env values are not found
Enabled accepting Policy object
Moved policy objects, added STS support
Updated readme
Added a forgetten file
Added Redshift support (only cluster creation/detetion)
Added Endpoint to Redshift Cluster
Fixed
Added more Redshift APIs
Added Redshift domain model APIs