Mapgen indev: float islands, larger far biomes
Add Ore infrastructure and l_register_ore()
Update lua_api.txt
Fix indentation of lua_api.txt
Add more error checking to l_register_ore
Use minetest.register_ore() in minimal
Ensure ore can fit in OreSheet::generate()
Vary ore sheet y position by noise
README.txt: Add some build stuff
Closed add object <-> object collision handling
Fix parameter list of obj:set_attach() and obj:set_bone_position()
Prevent infinite loop with invalid Inventory format