Renamed "toc" to "manifest" because more accurate
Remove the JS TOC and associated files.
Add breadcrumbs to topic pages.

Also fixed a type in element-descriptions.xml.
Undo change of toc to manifest, because wrong
Fix mess from changing manifest back to toc
Fixing content file naming problem.
Basic TOC working. Working on links to TOC files
Links to TOC files from each topic
Adding link back to docset index file from each page
Changing the way docset home is determined

Previously one topic set built at the root. It's index became the docset
index. Now all topic sets build in dir named for topic-set-id and one is
designated home-toopic-set in config. Ability to specify a different dir
name of topic set removed. First step of breadcrumb now link to home
index page, but this should actually link to docset toc, which is not
generated yet. Then there is the question of how to get back to docset
home page. Separate link?
Adding Home link to HTML pages
fixing some spelling error found in reuse-techniques.xml
Creating a index file at output root to redirect to home topic set
Change breadcrumbs so all steps except home go to TOCs
Move TOC generation fully into an independent step
Generate TOCs at presentation stage, support docset or topic set TOC build.
Fix misc build errors.