Converts AUTHORS to humans.txt

See http://humanstxt.org/ for an explination why this is a good idea.
Merge pull request #14 from sukima/feature/humanstxt

Converts AUTHORS to humans.txt
Add NHV.io link to homepage
Update meetup link in nav to point to /newhavenio
Add @danbernier to humans.txt
Merge pull request #15 from newhavenrb/nhvio-to-homepage

Add NHv.io link to homepage
Merge master into feature/homepage-redesign