To install the package from Gihub you can use devtools:
devtools::install_github("fkeck/subtools")
A quick introduction can be found here.
A list of cool projects using subtools.
A tidy text analysis of Rick and Morty by tudosgar (link)
Rick and Morty and Tidy Data Principles by pachamaltese (part 1) (part 2) (part 3)
Term Frequencies by Season by tdawry (link)
You beautiful, naïve, sophisticated newborn series by ma_salmon (link)