Upgrade to latest Rust.
Merge pull request #13 from metajack/rust-up

Upgrade to latest Rust.
Upgrade to latest rust.
Merge pull request #14 from metajack/rustup

Upgrade to latest rust.
Rewrite CFArray::each as an external iterator
Fix test failures.
Fix warnings.
Rename iterators.
Fix string usage now that rust has dropped trailing nulls.
Update make file to remove rustc warning.
Switch from -o to --out-dir.
Merge pull request #15 from metajack/rust-upgrade-mac

More changes for new rust.
Revert --out-dir on tests.
Update for language changes