pasta hierarchical data set.dist_tweedie() and stats-like
Tweedie functions; moved them to standalone tweedieDistr
package.Added report() and tidy() methods for
all model classes.
Details included in model_sum() for ES-based models
and STATICDISTR().
Fixed an error in the Tweedie quantile method
(quantile.dist_tweedie()).
MARWAL() forecast distributions are now truncated at
zero.