Ragdolls, save/load system, fonts and a skybox

This is a pretty big update, with a fresh new font, a save/load system, a skybox and animals with ragdoll physics.

I've added a font called "Supply Center" to make it feel more in line with the art style. I also added a skybox to add a bit more life to the atmosphere. I also made a model for the ore loader so it looks more realistic.

I've hopefully made the save/load system fully functional. I'm sure there's at least one or two bugs associated with that. Finally, I've added some cows and llamas. Be careful not to hit them, or else you get fined for killing them. You can use your horn (H) to scare them away.

I've fixed a few bugs along the way too.