#7 Function to save maze as a picture/print maze

[Brian Foley]

Sometimes it is useful to be able to save a picture of a maze for
illustration purposes, or print a hardcopy of a maze.

While it is possible to make a screencapture of the maze window,
this leaves you with a large bitmap, which isn't always convenient
to manipulate, and can look pixelated when printed.

It should be fairly straightforward to add an option to save an
image of a maze as some vector format (probably EPS or PDF), a
bitmap format (GIF/PNG?), or to print the image.

If nothing else it's a good opportunity for me to show off my PS
skills, and to learn a bit about the Java printing architecture. :)