~dricottone/pkgbuilds

ref: 17a17ade5c908e81970b7b876b9f2ed2eb8b1cc2 pkgbuilds/r-tibble d---------
Initial commit

A long journey to packaging r-tidyverse. The current highest-level
packages that are successfully built are dtplyr, waldo, callr, and xml2.
A handful of others (brio, digest, praise, units, zeallot) are currently
freestanding but will become dependencies soon.