Brainfuck Interpreter

Codethink Rust Sessions, ongoing homework project. Once this is completed, it will serve as a reference Rust project - for this reason, clippy is strict.

$ cargo run -- helloworld.bf
    Finished dev [unoptimized + debuginfo] target(s) in 0.01s
     Running `target/debug/bft helloworld.bf`
hello world

See also:

• https://gitlab.com/tpreston/bft