Internal weapon/tool capabilities to ease modding

[ChlorideCull]

Right now, modding in something that works as a hammer, sledgehammer or saw is fairly annoying, and means overriding a whole bunch of Lua files. I propose that an capability field should be added to "items.txt", which specifies whether it can be used as a hammer, etc.

 

I assume you guys at IndieStone are aware how painful it is, considering I saw a lot of if..else when it came to the stone hammer