Beta 20 - blacksmithing, and bugfixes

Beta version 20 released

I hope all the reported bugs are fixed in this version - if not, or should you encounter new bugs, feel free to send me a message via any channel convenient for you. Discord or e-mail are the best for me, but other channels are also fine.

As a new feature version 20 has metallurgy; The whole process is simulated step by stem  from producing iron ore to forging spear heads.