Merge pull request #1 from jmallison/master

Sync the README with last year's.
Issue 409: Intro text line height; Added line-height of 1em to intro-text
Issue 407: Link up the social icons; added urls to social icons
Reverting addition to top-nav markup
Issue 407: Link up the social icons; Adding fallback text for social icons
Issue 411: Change text on submit a session section.; Changed text to Coming Soon!
Issue 410: Fix the burger menu; Revert to default Foundation menu, fix for mobile that allows logo to overflow from top bar
Merge pull request #2 from penguininja/master

Issues 407, 409, 410, 411