fix(docs-data processor): add dummy version and fix template
fix(index template): shortName is now just name
feat(example search): ported keyword searching

This change introduces a new doc processor that extracts the keywords
from the text of the document and stores it in a searchTerms object on
the doc.

The docs-data processor has been refactored to make this data available
and also to expose the navigation hierarchy (still to be implemented on
the front end)

The search functionality on the front end now works, except the results
link to the incorrect URL still