Plan for scheduled releases and nightly builds

Create a roadmap where stable releases occur, reliably, every so often and create infrastructure for nightly builds.

Reliably-delivered stable releases will allow new features to be delivered to players within reasonable time while not putting alpha stuff in their hands, while also not letting the features go unused for months in unreleased code.

Nightly builds will allow brave folks to test out the latest stuff we're working on that should be stable without having to know how to compile C++ programs.