campfire simpler build

It makes sense for campfires to produce charcoal when broken. That is what happens when wood burn. However, one would usually build a campfire just with wood (logs and twigs) and would not add coal to begin with. It would make more sense for players to collect twigs and wood to build a campfire. This would also add a nice feel to the early game (waiting out that first night) where coal is usually unavailable. In addition, it would provide a (albeit a bit inefficient) way to produce some charcoal for torches in early game.