0.6.2a tileset added

Added a new outdoor tileset.

I'm not an artist so I ended up patching together two tilesets to get what I was looking for. There will probably be improvements in the future as I find something that better suits my needs (but I had a game coming up on monday so I threw this together quickly)

Special thanks to Stealthix for the base tileset. You can view the tileset here: https://stealthix.itch.io/rpg-nature-tileset