Toy scheme implementation in rust, following https://mgattozzi.github.io/2016/11/08/scheme-input.html

Ralph Giles 8b745db8ff Trim input before comparing to `(exit)`.		7 vuotta sitten
src	8b745db8ff Trim input before comparing to `(exit)`.	7 vuotta sitten
.gitignore	3da3ea1a84 cargo new --bin	7 vuotta sitten
Cargo.toml	9e2acc62eb Add minimal repl using rustyline.	7 vuotta sitten