Add module specific description to Widoco output

[ldesousa]

The goal is to have the model specific descriptions introduced in 27b6654 added automatically to the HTML procuded by Widoco. This would respect the phylosophy of all documentation outputs being automatically generated from the RDF.

Actions:

1. Add descriptions to the owl:ontology instances (e.g. with rfds:comment).
2. Update the generateDoc.py script to identify and use these descriptions.
3. Remove the .config files from the docs folder. As these are auto-generated and not meant to be edited manually.