The confidence intervals are mostly described in Alan Agresti's CDA book.
How to calculate the intervals in other software is described at the webpage for CDA.
To post feature requests or ask for help, try the PropCIs Issue Tracker.
To install the development version of the PropCIs package, it is easiest to use the devtools package:
install.packages("devtools") # if needed.. library(devtools) install_github("PropCIs", "shearer") library(PropCIs)