Updated README with COPR instructions. (#53)

* Updated README with COPR instructions.

* Changed package name from sif to sif-steam, to avoid any potential collisions and clarify purpose of program.

Author: Chapien

README.md

@@ -46,6 +46,13 @@ Gentoo users may use [ebuild](https://github.com/BlueManCZ/edgets/blob/master/ap
 
 Arch users may use [pkgbuild](https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=sif-git) from the [AUR](https://aur.archlinux.org/packages/sif-git/).
 
+Fedora and other RPM-based distro users can use the [COPR Repository](https://copr.fedorainfracloud.org/coprs/chapien/SIF). Install with:
+```shell
+sudo dnf copr enable chapien/SIF
+sudo dnf install sif-steam
+```
+The COPR is maintained by Chapien. Send installation issues to [[email protected]](mailto:[email protected])
+
 # Usage
 
 See `./sif.py --help` for all options.