Remove old spike pathway view and template
Basic pathway page (logged out view)
Change confusing "me" global to window.app.state
Trying to further simplify globals from window.app and window.app.state
to just window.app, which is now an instance of the app-state model with
some extra stuff thrown in. A little messy, but not bad.

Also pushing navigator.id methods down into app-state helpers.
Closes #122: fav buttons that prompt login also ensure favoriting on success
Remove spike requirements collection and test
Render requirements to grid
Merge pull request #123 from stenington/pathway-page

Pathway page