fix empty documentation of some arguments

  • Reworked twCoefversionMLEFlat
  • Migrated from RUnit to testthat
  • Density returns 0 instead of NAN outside (0,1)
  • Changed first argument name of dversion from q to x
  • Document argument n of rversion

Remove the library call to MASS.

Avoid writing file reports during testing and installation.

New features

density on log-scale

Thanks to @madeleine-empirical the density function dversion now has log an argument that allows computing the density directly at log-scale.

Further changes

Migration to github

The hosting of the development moved from r-forge to github. Releases will still be put to r-forge, because of its good package-checking setup for several platforms, and the help for submission to CRAN, but versioning and development of the code will be done on github.

Documentation

A package vignette, a README.Rmd and this NEWS.md file have been added.