Taking screenshot or recording crashes the game
My Ubuntu is in Portuguese and when I try to take a screenshot or record a gif, the game crashes trying to create a file:
``File "/home/jean/Documentos/pyxel-debug/lib/python3.6/site-packages/PIL/Image.py", line 1947, in save
    fp = builtins.open(filename, "w+b")
FileNotFoundError: [Errno 2] No such file or directory: '/home/jean/Desktop/pyxel-180731-095749.gif'``

If I create a Desktop folder on my home directory the problem is **solved**, but I don't that's a good solution.
An alternative would be creating a subfolder inside the game's current directory. I would do a pull request, but even that being pretty simple, I think that's more like a design decision, so it's up to you :relaxed: