<footer>: removed ul

No reason for list - no clear reason for grouping content in this way.
Replaced w/ series of <p>
<footer> back to top link

- <a> with id link to <body>
- correct coprresponding, page-specific # in <body>
<footer> basic markup structure & content

W/ semantic classes
Grammar

Added comma to list in desc. <meta>
Aria landmarks: <header>
Aria landmarks: <nav>
Aria landmarks: <div #main>
Aria landmarks: <footer>
Reposition "Back to top" link

Moved from <footer> to bottom of <div #main>: to separate navigation of
content from meta info of footer
Rename <div #main> to <div #content>

More descriptive of purpose, now that concept of "main" covered by role
attr