Update structure calls.
Fix rchk warnings; thanks to Tomas Kalibera for providing
a docker container allowing developers to run this check locally.
Use ‘REFERENCES.bib’.
Switch to Rd-based NEWS file, the old news is available
as NEWS.old.
Get rid of diffs caused by new warnings on using old RNGs.
Illustrations using the PimaIndiansDiabetes data from
mlbench have been adapted to use the SynthDiabetes data instead
because the former data are not shared in mlbench and the UCI Machine
Learning Repository anymore.