CU-2 Finished create user API call with tests

API call to crate users. Unit tests included. 
Also made a file to build the dynamodb tables

See
https://confluence.tinynova.com/display/CU/API

and ticket
https://jira.tinynova.com/browse/CU-2
You should make a setDynamo method and have the bootstrap use that to inject the dependency instead of calling the registry like this. Zend_Registry === Bad.