Tried fixing the sky

Pick up the sun, drop the sun. Pick up the moon, drop the moon.  Now you
have two of each in the room. Yeah, I don't get it either.
Made another class for SharedThingContainer

Going to check if it works after commiting
Fixed the indentation aaaand

Spaces are evil, firstly. Secondly, it didn't fix it, the new class.
Again, argh.
It says I need to commit