See #9031 and discussion in #9020. This will give us better
accessibility; when tagging is enabled, the citation can be
linked to the bibliography entry.
This changes some of the details of the layout and the default
template. We now make CSLReferences a special enumitem list
that will contain `\bibitem`s.
Internal links inside citations to ids beginning in `ref-` are
put inside a `\cite` instead of `\hyperref`.
Closes#9031.
John MacFarlane
353177f9e7