Renamed site sections

Cured some divitis by shifting from div to section.
Removed unused function
Added foundation for social display

I want accounts for the social menu to be set in functions.php, not
hardcoded into header.php
CSS cleanup

* Removed excessive comments.
* Cleaned up many selectors.
* Cured divitis.
* Removed border-radius from many items.
* Simplified several rule sets (form inputs).