apps/dtplite: Documented -exclude option in the code.
Updated doc generator to exclude test cases and internals. Added navigation to outside.
Updated the doc derived files
Docs: Fixed missing titledesc string in various packages
Docs: Fixed bad leading namespace qualifier.
dtplite: Fix toc/idx sorting. New option -toc for external toc instead of generated
localdoc tweaks: Reindex toc/kwic before generation, and override dtplite with the extended TOC.