plot.RDDdata: document
plot.RDDdata: change arg type to device, although unused
RDDplot: add/update argument nbins
RDDplot: update man page, add details
waldci: use stats4::coef instead of triple :::, recopy stats:::format.perc
vignette: remove biblio file jss
misc: change ::: into :: for packageVersion
test: minor updates in versions
DESC: remove sandwich from depends
test: update for change in package sandwich depends