Changes in Version 0.4-0

  * Data structure generated by DR_data() has changed - the new objects can now be integrated into data frames.
  
  * Formula processing is now handled by the package `Formula'.
  
  * new methods have been implemented, especially for the class DirichletRegModel.

  * the documentation is now quite complete.

  * some speed improvements could be achieved.
  
  * lots of minor (invisible) changes.

Changes in Version 0.002

  * Added the analytical Gradient and Hessian for both parametrizations.
  
  * Optimization: preliminary results by BFGS that become starting values for Newton-Raphson optimization computing the final results.

  * Implemented some residuals
  
  * Updated help entries