yt-3.0 repository will become read-only.This simply means that if you are using yt normally, from the repository here:
you will be able to switch to the yt-3.0 branch more easily. And, if
you currently have a fork of the repository yt-3.0, you'll need toswitch to using a fork of the main yt repository. This is easy, just
fork the main yt repo (unless you already have!) and push your yt-3.0changes there.
Just as it has always been, installing the "stable" and "development" versions
from the install script will still only put you on the latest stable and development
versions of yt-2.x. Additionally, doing "yt update" will not accidentally switch
you from one version to the other.