I've added a check for missing SteamOS EFI entry which happens with some BIOS updates. The script will check if it's missing or not, and if it's missing will recreate a new "SteamOS" EFI entry. This also adds the systemctl daemon that makes rEFInd the next boot top priority every time SteamOS boots. This is part of a workaround (or fix even) that helps the rEFInd config survive SteamOS branch changes and SteamOS updates (excluding BIOS updates).
In case pacman has an issue getting and installing the refind package, this installer should work by manually downloading (from sourceforge) and installing.
