Making a theme based on modus

In modus-theme 5.0.0 Prot introduced a structured way to build a theme based on modus. Just a few days ago he released version 5.1.0 with some improvements in this area. The official documentation of how to build on top of the Modus themes is very good. It's focused on how to make sure your theme fits in with the rest of the "modus universe". However, after reading it I still didn't have a good…