[website] Simplified Action and subclasses.
[website] Added display of current player(s).
[website] Implemented ThiefAction in werewolves variant.
[website] Renamed Prophet to Psychic; Renamed Protector to Bodyguard.
[website] Updated Engine to generate JSON result; Removed JSON template.
[website] Allowed non-executable action to be skipped automatically.
[website] Added game timer in template.
[website] Updated JSON output of Engine.