Release version 0.2.0

Add author to README

Remove redundant `Version ` prefix from changelog headings

Split code into several modules

Update copyright years

Switch to Rust Edition 2021

Update clap to v3.1.18 (from v2.33.3), use derive feature

Update toml to v0.5.9 (from v0.5.8)

Update rodio to v0.15 (from v0.14)

Update evdev to v0.11.4 (from v0.11.1)

Tweak README, changelog

Begin development of version 0.2.0

Use `if let` instead of `match` where appropriate

Configure Travis CI

Bundle `Cargo.lock`

This is recommended for application binaries.

Update app label for, add description to argument parser

Release version 0.1.1

Put actual MIT license in license file

Release version 0.1

Initial commit