- Security update.

- Added Hard bot difficulty
- Rulebook can now be accessed from pause menu
- Updated rulebook with new section for game interface

- Fixed an issue with counting points during the "collect light" phase
- Fixed an issue with private lobbies being visible to the public
- Players without an ELO rating will no longer see an ELO box on their profile
- Added a rulebook button to the in-game menu
- Addressed a bug that kept friends from a previously logged-out account on the list after switching accounts