CRAN v0.6.0

Extensively updated documentation for each distribution to include additional details about the statistics associated with each distribution.

New features

• Added has_symmetry() generic to identify if a distribution is symmetric.

Probability distributions

• Added dist_laplace() for the Laplace distribution.
• Added dist_multivariate_t() for the multivariate t-distribution.

Improvements

• Extended documentation for many distributions to include detailed
  mathematical formulas for the statistics of each distribution (#141).
• hdr() now produces exact results for symmetric distributions (#123).
• hdr() uses more quantiles by default (512 -> 4096) for more accurate HDRs (#123).
• Transformed distributions now work better for monotonic increasing functions
  when the domain of the untransformed distribution is R (#129).
• Added cdf() and quantile() methods for dist_categorical() distributions with
  ordered factors (#136).
• Added support() method for dist_gpd() distributions.
• Added cdf() method for dist_multinomial() distributions.

Bug fixes

• Fixed dist_gamma() not allowing the scale parameter to be used (#132).
• Fixed dist_negative_binomial() calculation of skewness and kurtosis for p!=0.5.
• Fixed floating point issue that caused dist_mixture() to incorrectly throw an error when weights did sum to 1 (@statasaurus, #134)

Breaking changes

• The type argument for dist_multivariate_normal()'s quantile() method
  has been renamed to kind to avoid name clashes with quantile.default().