This means you can now install it through Atom’s standard package system:
Open settings and go to the “Install” panel.
Search for “foldingtext” and install the package.
Once you have done this you’ll automatically be notified of updates and you will no longer have to use the command line to install.
FoldingText for Atom is still a work in progress in the sense that it doesn’t yet replace FoldingText 2.0. But I think the basic outlining features are stable at this point and ready for real world use.