denormalized the number of comments into the post --commit 10-5
added basic notifications collection --commit 11-1
display notifications in the header --commit 11-2
added enough posts that pagination is necessary --commit 12-1
augmented the postsList route to take a limit --commit 12-2
refactored postsLists route into a RouteController --commit 12-3
added nextPath() to the controller and use it to step through posts --commit 12-4
use the iron-router-progress package to make pagination nicer --commit 12-5
use a single post subscription to ensure that we can always see the right post --commit 12-6
added basic upvoting algorithm --commit 13-1