mozilla/servo — pull request #2396 by Manishearth (2014-05-10 17:08:47+00:00)
Title: Rust upgrade: util crate

This fixes the errors from the util crate.

There are still a couple of `warning: use of deprecated item: casting &T to &mut T is undefined behaviour: use Cell, RefCell or Unsafe` warnings which I'll work on later.

I'm not very sure of the Show and Result commits -- as far as I can tell the changes are correct, but I might have missed something.