Changes to get docs to build
Add scripts for generic-task-topic and write new topic content.
Minor corrections to the topic
Save a copy that builds

Before I start more experiments with the build system, save a working
copy. Note that the test and dummy files will be deleted before pushing
to the central repo.
Latest content

Topics getting-started and adding-a-topic are ready for review.
Updating authoring CSS
Fixing wierdness
Fixing wierdness