Aidungeon

Added

- `/reset` is a new command with the same functionality as the
old `/restart`, saving the old and beginning a brand new game.
- Ratings after death and winning
- `get_rating` function to `Story` objects.
- New content in fantasy grammar.
- Formal grammars for peasant and rogue contexts/prompts.

Removed

- F-strings for python 3.4 and 3.5 compatibility
- Trailing comma in function args for 3.5 compatibility

Fixed

- Typos in story grammar.
- AI no longer sees `You you` when the user inputs commands beginning with `You` or `I`.
- Some caption issues with actions.

Changed

- `/restart` now restarts from the beginning of the same game.

Fixed

- Bug preventing `Custom` game setting selection from working.
- Code style.

Added
- This changelog!
- Formal grammars for the noble, knight, and wizard contexts/prompts.
- Better regex logic to detect terminal states.
- Directory `saved_stories`.
- A few more censored words.
- Feedback for user for the censor command.
- iPython notebook utilities to save/load to Google Drive, and an OOM error workaround.
- install.sh now detects python version and fails if it's not supported.
- Issue and PR template improvements.

Fixed
- Loading not working on `develop`.
- Loading now print properly.
- [No Save Game on Quit for Loaded Games](https://github.com/AIDungeon/AIDungeon/issues/97)
- install.sh no longer tries calling `apt-get` on distributions without it.
- Arch Linux now works with install.sh (with pyenv is used or python3.6 is set as python3).
- A bug that caused game to crash if given an incorrect game ID to load.

Changed
- Made `install.sh` more robust.
- Sorted imports.
- Split the model downloading script into `download_model.sh` from `install.sh`.
- User commands are now case-insensitive.
- User commands are now denoted with the prefix `/`.

Added
- AIDungeon 2, which allows players to type in any desired action.

Added
- AiDungeon Classic, which gives players action options to choose from.