gah, need to include all this for now for production

(some day I will make a buildpack for deft)
depend on pg gem in production
added Ruby version and rails_12factor (for prod) to Gemfile
handle ActiveRecordError instead of RecordInvalid
whoa, BIG mistake!

This should fix the CookieOverflow issue.
reorganizing assets to follow conventions
couple of fixes to CodeMirror rendering
added links to GitHub and OSS dependencies
turns out content_for? didn't work in a partial (why?)
updated users.example.yml w/ GitHub user names
very preliminary work on exposing an API for Node consumers
fixed capitalization of "Set" seed function
added repository field to package.json