Note these files use HyperMarkdown. Along with the traditional links, they use a new 'include-link' which with the right renderer will include other links markdown files.
Here's the syntax for a normal link
+[Waves Module to import](https://github.com/mixmix/example-course/blob/master/Waves.md)
here's the syntax for an include-link:
+[Waves Module to import](https://github.com/mixmix/example-course/blob/master/Waves.md)
check out : https://github.com/mixmix/example-course/blob/master/mix-recipe.md using the hypermarkdown renderer