Building seems to require nightly, not just beta due to use of the `or_patterns` feature. rustup toolchain install nightly rustup default nightly All

Building seems to require nightly, not just beta due to use of the `or_patterns` feature. rustup toolchain install nightly rustup default nightly All tests passed for me. Check out main.rs to get an idea of where it's at. Not as fun without text though :)