Slick, declarative command line video editing & API
https://github.com/mifi/editly/compare/v0.4.0...v0.5.0
https://github.com/mifi/editly/compare/v0.2.0...v0.3.0
https://github.com/mifi/editly/compare/v0.1.3...v0.2.0
https://github.com/mifi/editly/compare/v0.1.2...v0.1.3