Update documentation regarding the "colwidth" attribute handling.
and the included `Exchange Table Model`.
Unify name use.
Revise/fix hyperlinks.
Improve wording/formatting.
Correct description of the "names" doctree element attribute:
Under specific circumstances, an element may have both,
``names`` and ``dupnames`` attributes.
This is intentional to provide a means to solve conflicts in
implicit hyperlink targets (e.g. two section headings with similar title),
e.g. ::
My Title
--------
.. _my title:
my title
--------
`My title`_ links to the second section.