add transcription of owner's manual

mirrored from
http://web.eecs.umich.edu/~deroo/bike.dir/owners-manual.dir/owners-manual.html
with explicit permission.
move owner's manual contents from owners-manual.html to index.html
add a TODO about archiving abandoned sites
remove out-of-context navigation

Our structure is different than the original site's.
fix a few typos
apply 5united formatting to owner's manual index page
add link to owner's manual
Merge branch 'owners_manual'