Added grouping elements to about.html
updated tag for subtitle
added title information
updated header with a tag and gave h1 and p class=hidden
fixed input tags and added filler for hrefs
added # for contact us href
added special characters and corrected header link
adding role attributes
changed footer items role to navigation
Merge pull request #3 from gtwalford/development

Added grouping elements - initial classes, ids, and roles.