[MDL ED] Swinging doors

[Daemian]

There, I changed some stuff and now it's working fine.

I don't remember exactly each change, I'm not having my best day.
But I put 1 gravity to each window, attached the corresponding bodies, resized bodies so they don't collide and interfere with the movement, remade the joints, etc. 
And you had the model backwards for some reason, put it back if it was intended.