Tufte in R6th of July 2017: (1) New category - interactive plots made in Tufte-style with R - the first addition is basic line plot and basic barchart with the use of package highcharter; (2) Revised slopegraph in base graphics - Thomas Leeper has implemented his slopegraph functions into development version package on GitHub; (3) Revised sparklines in lattice get a gray bands (thanks to Bryan Urban for sha
