Rendering converted to single-page output, updated README, misc. fixes.

First rough version of the single-page rendering. Updated README and main template, adding the `encoding/` directory, and the missing top-level docs, to both. Deleted many redundant empty lines.
We're dropping the OT prefixes everywhere, so this is just "armoring" now. 

I'll fix it since the actual document is out of date now anyway and will probably be removed.