Add reference docs generation using docma

* Adding support for the minimal generate reference documentation
  using docma. Running `npm run docs` or `npm run serveDocs` will
  generate documentation from the source-files using docma.

  This branch still does not commit the generated `./docs` output
  since it is still just used to try out and get a feel for how
  the generated documentation looks and behaves.

docma.json

@@ -0,0 +1,4 @@
+{
+  "src": ["./src/**/*.js"],
+  "dest": "./docs/reference"
+}