Thanks for sharing!
I appreciate that you've taken the time to provide some documentation. That gets skipped too often.
I think your installation instructions are unnecessarily complicated. They also assume the location of the sketchbook folder, which could be in different locations depending on OS and whether the user has configured the IDE to use a non-default folder. I suggest that you change them to use the Arduino IDE's Sketch > Include Library > Add .ZIP Library feature. Not only does that reduce the number of steps, it also ensures the library will be installed correctly. If that is something you're interested in, I'd be happy to submit a pull request for the change to the readme file.