version 0.69-5

Version 0.69-5, 2019-04-11:

Added function ciplot() for plotting a set of confidence intervals.

Added operators %nin%, %win%, and %wnin%.
a %nin% b is like !(a %in% b)
a %win% b is like a[a %in% b]
a %wnin% b is like a[a %nin% b]

Added function spell_out() for spelling out numbers provided they are
smallish integers. Goes with the datasets numbers and Numbers.

Added function revgray() that's like revrainbow() but white/black.

In dotplot(), make "Group" the default axis label whether rotated or
not. (Was when rotate=TRUE, but not when rotate=FALSE.)

Use Markdown throughout documentation