implement and test RA core functions
fix comment for testExecuteQuery()
extract interface for QueryResult to enable special commands
fix visibility and add flag for quit for IQueryResult
refactor into separate db, operator, query, and result packages
split RAXNode implementations into separate classes
implement list relations query and improve StandardQuery tests
implement sqlexec, changing the API for DB.execCommands() to do so
refactor queries to return JSON only, and implement RAConfig
fix uninitialized result JSONs and implement schema and entries
deserialization
add ability to close DB connection