Display notifications in the header
Only sync notifications that are relevant to the user.
Add enough posts that pagination is necessary.
Augment the postsList route to take a limit.
Refactor postsList route into a RouterController.
Add nextPath() to the controller and use it to step through posts.
Add a spinner to make pagination nicer.
Use a single post subscription to ensure that we can always see the right post
Add basic upvoting algorithm.
Grey out upvote link when not logged in/already voted.
Add pluralize helper to format text better.
Fix pluralize helper.
Better upvoting algorithm.
Add routes for post lists, and pages to display them.
Update header bar to reflect new home route
Add active classes to the header.