Cleaned up warnings and compile errors for Rust nightly
Merge 7e7455d0450b678438f6fa58cac643dec89c3c1f into 2e5a3e50d26285d41981f16b2a5c68cb694e9c9d
travis: correct repository add
Merge commit 'refs/pull/3/merge' of https://github.com/jmesmon/rust-systemd