0.1.5 - Double doors, graphics settings, and bug fixes

0.1.5 - Double doors, graphics settings, and bug fixes
- You can now place two doors next to each other to form double doors that open together. They should be fully functional, and should open outwards depending on where you're standing. They should also not open if the path is blocked, and close if a tile is placed in front of them while they're open. I did this in preparation for enemies that cover multiple tiles (like a giant slime). will be working on multi-tile pathfinding next
- There are now graphics settings so we can see if the game will run on a raspberry pi if the GPU intensive stuff isn't used
- You now are invincible for a little bit after respawn
- Lots of bug fixes.