* Change formatting of the network/user_guide tables
* Tables had hardcoded line breaks to workaround a bug in the
read-the-docs theme. Change those so that they now flow according to
the browser size.
* Also switch away from grid tables to the simpler to create and read
simple tables
* Changes to table stylesheet
* valign all content, not just the first column. This becomes important
with more than two columns
* Set the font-weight to the first <p> element inside of the first
column. This allows us to simplify the first column when everything
there is the attribute name
* Change platform_index footnote from numbered to dagger symbol
The footnote notation was very odd to read. Try using a symbol for the
footnote instead of a number to see if that will clarify it. We can't
manually specify symbolled footnotes, though, so we have to emulate a
footnote with an internal link. This loses the backref to each place
that the footnote was used but since that was the portion which was hard
to read, perhaps that's for the best.
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