Delete some of the unused entities (going to need to find a way to create the schema)
Since we've really only got two public classes now, just move them out of the nested namespaces in the root
Add schema creation support

- Move the CQL default schema script into the project as an embedded resource
- Do some basic parsing of that script to execute the CQL needed to create the schema
Add a basic CRUD test to the integration tests

- Fix bugs found in the store related to null/empty usernames (and preemptively fix the same bug with null/empty emails)