Install Gnome 3.12 in Fedora 20 through Repository

Gnome 3.12 is now available for Fedora 20 through a third party repository maintained by Richard Hughes (Gnome Power Manager and PackageKit Maintainer). This repository gives fedora 20 users (who uses Gnome 3.10) a smooth update to Gnome 3.12.  Usually a new gnome version will be available with a new fedora release. Fedora releases are streamlined