Upgrade to latest Rust.
Merge pull request #7 from metajack/rust-up

Upgrade to latest Rust.
Fix visibility for mac.
Merge pull request #8 from metajack/rustup

Fix visibility for mac.
Switch from -o to --out-dir.
Revert to using -o for tests
Merge pull request #9 from kmcallister/otest

Revert to using -o for tests
Update for language changes