Fix regressions.
Rerender from scratch.
Read document structure dynamically to be able to react on structural changes.
Updated package.json
Adapt to new Container API.
Introduced a flag that turns off disabling of TOC for empty index.
Get rid of proprietary Avenir.
Smaller headings in TOC.
Merge branch 'prototype' into 0.2.x

Conflicts:
	toc.css