Putting spacing/padding into #content instead of each subtag

about.css isn't necessary any more (more duplicated code removed)
added h3 to common.css for use in all pages (was for resume update)
left/right column clean up. sub elements no longer need horizontal
padding/margins.
removed almost all of resume.css as most could be reused and was put in
common.css

@jenglish724 This is an example of a verbose commit message. Writing up
like is encouraged.