Use cassandra as database
Add cassandra ddl
Use UUIDs for ID values
Add cassandra authentication and authorization
Add workaround for cassandra startup error
Remove MySQL stuffs from cassandra branch
Return actual name count in countNames
Remove block
Return single result from selectName
Use async execute queries
Merge branch 'cassandra'

* cassandra:
  Use async execute queries
  Return single result from selectName
  Remove block
  Return actual name count in countNames
  Remove MySQL stuffs from cassandra branch
  Add workaround for cassandra startup error
  Add cassandra authentication and authorization
  Use UUIDs for ID values
  Add cassandra ddl
  Use cassandra as database