Add Cargo support.
Merge remote-tracking branch 'origin/cargoify'
Add active_object to Cargo.
Merge remote-tracking branch 'theirs/master' into cargoify
Merge remote-tracking branch 'theirs/master' into cargoify
Removing custom Travis configuration.
Merge branch 'master' into cargoify
Merge branch 'master' of github.com:Hoverbear/rust-rosetta into cargoify
Added accumulator_factory to Cargo.
Merge remote-tracking branch 'theirs/master' into cargoify
Added S-expressions to Cargo.
Merge branch 'master' of github.com:Hoverbear/rust-rosetta into cargoify
Merge pull request #230 from pythonesque/cargoify

Add Cargo support.
Update Cargo.toml with links. #235

Note line 375-377.
Update README.md for #235.
Update readme to reflect #230 and #35