This is to add the current user.

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.

Feature/image upload improvements

See merge request !2

Feature/retweet

See merge request !1

Apply different styles to reply, retweet and favorite buttons

Expand API service for retweet

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.