We've introduced a manifest for the clib version system that includes a
version number; we should update it at release time to correspond with
the version number in the header.
Our non-technical documents are currently floating around loosely in our
project's root, making it harden than necessary to discover what one is
searching for. We do have a "docs/" directory, though, which serves
exactly that purpose of hosting documentation.
Move our non-technical documentation into the "docs/" directory. Adjust
all links to these documents.