Refine and adjust all styling for home
Remove commented out social media links
Add jQuery dependency
Revise home content, nav, wording
Cleanup social media links, remove incomplete slide link
Clean stylesheet lines, cruft
Update opening caption
Add ociton for hero decoration
Tweak hero styling
Tweak home page titles, typos
Reverse merge to resolve layout updates

Conflicts:
	_layouts/bare.html
Fix Training logo selector refactor
Cleanup dup hero styling
Add octicon background to hero
Merge pull request #49 from github/home-layout-tweaks

Home page layouts, wording, content adjustments