Hi, great works, but why not update recently, how can I help on this project?

I am using R for several years with statistics and plot, but not worked with GitHub yet.

This project is so great because I also want to combine shiny with ggplot2 before years ago, but I dont know where to start. 

So I am really happy when I saw this project, and I want to work together to make this better.

Are you still maintaining this, and what can I do ? 

Thank you