Added some PHP-style share link tests

Having issues getting the states to load through properly, so this
might be an issue.
Merge branch 'master' into social-sharing
Added tumblr/twitter share links!

Static HTML at the moment.
forgot to remove old share link
added a test promo screenshot

For twitter card
restyled sharing buttons, cleaned up storyline, updated the build
Merge pull request #4 from metermaid/social-sharing

Simple social sharing links