XKCD Easter Egg

Usage:
```
make sandwich
```
(In homage to: http://xkcd.com/149/. I didn't figure sudo was necessary in this case.)

Not sure this works, though, since I don't have a Replicator, and I am absolutely new to Makefile scripting. If someone could test this, that would be great!

Also, the file is a little big for an easter egg, but I haven't been able to find a smaller model. Not exactly something you would print everyday!