Fixes issue #4

This fixes #11.

Much smaller filesize for vendor.js, although we'll have to see if all
the intervals are ok.

I still have to think about how to integrate them in the state system...

The idea is that all interactions should move there, so components
don't have to pass around credentials all the time.

This adds a favorite notification.

Kind of wonky. Would be better if we used the AS endpoints.

This now uses nearly only mutation, to take advantage
of vue's mutation tracking.

They should be in allStatuses to keep only one reference, but they
should not get into the timeline, or it will mess up old status
fetching, because they have a very low id.

Fixes problems with liking + likes count.