#127 Leather Armor

What the title says. Leather armor would be nice to have. Textures are the biggest issue, as I am not a pixel artist.

This is also a prerequisite before I can add anything like temperature to the game, otherwise people would freeze to death.

In fact in regard to temperature, it would be nice to have cloth armors as well, which aren't really "armor" (but use the same armor code) the purpose of which is to survive in cold places.

This is in the game