curry-macro vs currying vs fn_zip

Have fun currying using Rust's native closure syntax.

A crate for currying anything implementing `FnOnce`. Arguments can be passed one at a time, yielding a new something implementing `FnOnce` (and possibly `FnMut` and `Fn`) which can be called with one less argument.

Provides a zip trait for functions, allowing two functions to be combined before being called.