The method, fs::canonicalize(), is unstable and can't be used for stable
builds. We already have our own implementation of canonicalize(), which
supports more options than the Rust library implementation.
I switched over to the getopts crate on crates.io, instead of Rust's
private implementation. This will allow coreutils to build for Rust 1.0.
I'm splitting the updates into several commits for easier reviewing.
I updated to the nightly build, completed support for the verbose flag,
and refactored the canonicalization method to simplify and add support
for Windows paths.
