Rust port of 65 Nim

[DLotts]

Nim in Rust. This was a real challenge because of all the goto's going out of loops down to code below. I used a ton of breaks and continues. I tried to figure out how I would have written these without them, but I'm not seeing it yet. I handled them like this:
let is_odd=false;
loop {
stuff;
if x%2!=0 { is_odd=true; break };
if done {break};
stuff;
}
if is_odd {
handle_odd();
}
regular_stuff();

The logic in this is a little tricky, especially with arrays being a little different. I think I got all the bugs, because it seems to win no matter what I do.

[coding-horror]

Excellent! I'll be sure to move your comments to the readme.md for future porters!