show dropdown only in sections and labeled as the current one
Initial pass at Devise integration.
Put content into the exchange section.  Take the opportunity to write a general-purpose accordion template that reads from a structured array of content.
Take "bank" out of exchange. Fix log-in code to use devise methods. Add content file for enter-new-earth section.
Update the default layout.
Render the breadcrumbs in the partial.
Only render the sections when it's called for (not in the login page)