Fix comments on Diversity.Compatibility
Create sub-module Diversity.Hill, and function hillnumbers() to provide explicit support for Hill Numbers.
Add in sub-module Diversity.Jost to provide support for Jost's diversity measures.
jostD() is simply qD() from the main package or hillnumbers() from Diversity.Hill
jostbeta (or jostβ) is Jost's naive beta diversity, the gamma diversity of the ecosystem divided by the alpha diversity.