CSS/HTML changes

I made the nav bar have a border instead of a background color to fit
themes better.

I changed basics1.html and basics1-quiz.html to not be full HTML pages
as they're already being read into an HTML page and don't need full
html, body, and head tags. The link tags in the pages were breaking the
themes due to being called in after the #themeLink link tag
Revert "CSS/HTML changes"

This reverts commit f32d048a376c77c49be3c5b3bb85edced55784f6.
Revert "Revert "CSS/HTML changes""

This reverts commit e022517c335e9697e9912cd8f6eb1cc79ce916eb.
Update to CSS/HTML Changes