remove macos and windows from github check workflow

made visible again the R CMD check badge

removed kapow from this release

moved badges into a single section of README

Create rhub.yaml

fixed object name from aj to df_proportions

replaced second instance of map(...)

latest version fixes and checks

all notes and warnings removed

replace group_by_()

Update README.md - moved note re JAGS install to top of section

Update README.md to include updating R instructions

Update README.md with instructions for JAGS

Update README.md

v2.1.9 accepted by CRAN