GGTaxonomy: STATA module to identify the most suitable Generalized Gamma family model

I improved on Andres L. Gonzalez ggtax command by adding a confidence ellipse that better represents uncertainty around both the kappa/sigma parameters.

STCRMIX: Stata module to estimate mixtures of generalized gamma distributions for competing risks analyses.

This STATA module implements the idea displayed in Checkley, Brower, and Muñoz, using parametric survival methods for competing risks.