the world file:
Robot 1 1 e 0
produces an error within a loop, saying that it fails
to recognize the lower-case "e". This makes it really
hard to edit the world file and fix the problem.
Perhaps once PyKarel recognizes that a world file
contains a syntax error, it can stop trying to compile
the world?
I know this has probably been solved for the linux
version, but I'm not cool like that yet.