- Renamed debug mode to devtools and improved the corresponding documentation
Devtools are toggled with `--devtools` switch or adding a `Devtools: 1`
entry to the config.txt (#32)
+- Added automatic progress saving upon level completion, and not only when
+ closing the game.
- Use standard directories to store game config and user data (#22):
* Linux: XDG_CONFIG_HOME (default `~/.config/lugaru`) and XDG_DATA_HOME
(default `~/.local/share/lugaru`)