Save examples as directory.
Include updates made by HJW

* replaced the misused pre() operators by initial equations
* rename of class to model where appropriate
Replaces more "classes" by "model" and capitalise names
Adds the HJW variant of the Kundur examples.
Update the README with current state
Annotation and white space clean up.
Save the whole library in directory structure and not files.

Helps cooperating as only single files are getting touched.
Move the docs folder under `Resources/`

This is the proper place for non-Modelica files following the
Modelica conventions.