pull: Add licenses-full.json with all the information

pull: Add licenses-full.json with all the information

I prefer the minimal index (as I explain in the previous commit), but
some consumers need details on multiple licenses and prefer to collect
data with a single network request.  Even with all the data in one
endpoint, I don't expect this to grow to a point where it would be
expensive to serve.  And at the moment, GitHub is donating the server
bandwidth anyway.

Also add anchors to the README so folks can link to the docs for a
specific endpoint.  We need to use the explicit closing tag (vs.
<a name="..." />) to get GitHub to render Markdown in the remainer of
the license-list paragraphs.