version 1.5
- SOEP data file added

version 1.4
- summary function updated

version 1.3
- discrete outcome margins included.
- dependence and dispersion parameters allowed to depend on linear predictors. 
- manual updated.

version 1.2
- citation file fixed.
- more efficient and stable smoothing method implemented.

version 1.1-1
- derivative functions slightly improved.
- manual updated. 

version 1.1
- 90 degrees rotated version of Clayton, Joe, and Gumbel implemented.
- derivative functions re-written more efficiently.

version 1.0
- prediction function included.
- bivariate copula errors for normal margins implemented.

version 0.1
- initial release.

