- `GameEnv.dice` is now a matrix regrouping players and casinos dice,
- New flexibility in defining `GameRules`. Enables solo mode.
- Better decoupling of `GameEnv`, `BasePlayer`, `Game`.
- Added `greedy_score` and `greedy_first`, removed `greedy_shy`.
- `confront` and `play_vs` now take `**gameargs`.
- Removed unused `_custom-imports.py` since `0.1.2`