v0.3.0

1. Added all and await methods
2. Documentation https://docs.rs/promise-rs

v0.2.0

1. Added onRejected: for catch method, and second argument for then method.
2. Added value for resolve and reason for reject methods. Type should be Option<String>.
3. onFulfilled and onRejected method should always return Option<String> or None.

v0.1.0 - It's Alive

Just create new promise Promise::new(executor), spawn executor in new thread and chain then(on_fulfilled) handlers.