replaced facebook logo
cleaned up code involving color themes
added background images to home squares

closes #12
changed contact icon sizes
added new files
Merge branch 'develop' into fix#13-sprites

Conflicts:
	home/home.css
	home/home.less
changed contact icon images
added sprite for contact icons
rearranged some CSS files
renamed hr comp classname and recompiled css files
wrapped instances of `per se` with `i[lang="la"]`
modified home spiral transitions
Merge branch 'develop' into feat#19-docs

Conflicts:
	core/styles/all.css
	core/styles/tools/_grad.less
	site-design/semantics.html