A FAQ modal

This is a very basic FAQ modal, because people keep asking what the
seals are that they can use. It can be accessed from the "FAQ"
link added to the "Filters" dropdown, so it's out of the way.

Perhaps not the most obvious place for it. But it works.
Merge branch 'master' into faq-based-master
Fixes for state, FAQ, and responsiveness

Conflicts:

	assets/templates/lists.html
Merge pull request #41 from iFixit/faq-based-master

FAQ Modal based on master