datplot 1.1.0

Using either the original calculation (weights) or calculation of
year-wise probability is now an option in datsteps() with the
argument calc = "weight" or calc = "probability"
There is now an option to calculate the cumulative probability in
datsteps() with the argument cumulative = TRUE. This only works with
probability calculation instead of the original (weights) calculation.
Significantly improved the efficiency of datsteps().
Change and improve error-handling of scaleweight().
Remove UTF-8 characters from data and other files to comply with CRAN.
Update documentation and add a pkgdown-site.

What's Changed