Ammend Database Nomenclature

- Removed 'SET SEARCH_PATH=clue'
- All table names are references as clue.table_name (e.g. clue.hand).
- All table and field names are lowercase.
- All table names are singular (e.g. 'cards' vs 'clue.card').
- All compound table and field names are delimited with an underscore
(e.g. 'gameSpaces' vs 'clue.game_space')
- Created table clue.user_info.