Changes in homepage
Fixes
Fixes
Eliminated misuse of <section> tags by changing them to <div>s
Removed redundant <span>s
Appending bootstrap navbar
Reformated, adpoting header is half done
Header almost done
Little cleaning in scss file
Affix and scrollspy works. Navbar is finished
Mail works
Merge branch 'master' into features/home-page

Conflicts:
	index.html
Reduced navbar's header height to 40px by customizing bootstrap source
Finished homepage, everything works
Added a showing logo
Toggle works