Adding a Roku to a Logitech Harmony Remote

I got a Roku HD player from recently and, as with any electronic device for displaying content on your television, it came with a remote. I have a refurbished Logitech Harmony 880 remote that I use to control all of my devices so after verifying that the Roku worked (and adding my Netflix, Amazon Video, and Flickr accounts to it), I decided to add it to my remote’s repertoire.