The module page attempts to outline "normal" maven directory structure; and give an overview of how our modules are arranged in a checkout.
A couple small fixed:
demo - no longer used (and has been added)
* ogc - added
* docs - added
* Removed reference to "Maven 2" standard layout (as we use maven 3 now)
I softened the words here to be "The modules are are organised according to their role (some examples are shown below):" hopefully allowing this page to not go stale so quickly.