changelog.txt

23.5.
- update printing of formatted directions
- add command log (for save/load functionality)
- move messages from code to separate YAML file
- implement save game (based on command log) 

25.5.
- fix walkthrough, customize so it can used as a save
- replace puts with custom say method
- don't print actions' output during loading
- remove obsolete Player.action_type variable
- refactor drop method

27.5.
- added new (useless) object into game: a pebble lying on the crossroads
- bugfix: you can still see gemstone after you pick it up
- refactored pick_up and look_at methods

30.5.
- add file_name parameter to save method
- move save method into Game object
- bugfix: make preposition (to/on) voluntary in give/use commands

5.6.
- did several general-scope refactorings

6.6.
- refactor give and use commands, make them more universal and configurable
(and made quite a mess in the code :|)