Weekly development report: 2019/12/21

Looks like unit tests works (almost) properly - no bugs reports this week, so no work on the stable version of the game.

In the development version:

• Finally finished (for now) adding unit tests. Probably from time to time there will be added one or two more, but definitely not that much like was by last months :) Plus still no unit tests for GUI. Main reason is that GUI code soon will be very altered.
• From visible for the players changes: whole week was dedicated to implementing ideas gave by player's feedback. This is also finally finished, thus I hope in next week here will be more to report.
• As usual, added few new items and crafting recipes for them. Surprise, this is almost finished too :) Just a few items left to add for next week.
• Few smaller things in the project organization: added code formatting to unit tests, updated contributing guide, etc.