Add dynamodb-datastore sources to nodeSources
Add module to create DynamoDB Structures

Add module dynamodb-datastore/structure
Add tests for dynamodb-datastore/structure
Add mocks
Add model

Add dynamodb-datastore/model
Add tests for dynamodb-datastore/model
Add query

Add module dynamodb-datastore/query
Add tests for dynamodb-datastore/query
Add main module
Merge branch 'dynamodb-datastore' into develop