Small improvements
- Various improvements to texts.
- Added two more hints to the maze.
- Reduced double click delay.
- Autosave is now enabled by default.
- Fixed using None as a dict key. (really this time)
- Fixed displaying nested lists.
- Fixed some issues caused by vertical tabs.
- Fixed the %= operator.
- Fixed get_cost returning an empty list instead of an empty dict when called on some entities.
- Fixed "This is not a valid statement" error message at the beginning of the file when there is a random comma somewhere.
- Fixed undo not causing the game to reparse the code.