Changes in version 1.5.1
  * Fix bugs: validmu function (ensure it returns TRUE or FALSE), imports
  
Changes in version 1.5
  * rdisclap returns integer vector
  
Changes in version 1.4
  * Added possibility to use parameter p = 0

Changes in version 1.3
  * Null deviance corrected (again, sorry) for d != 0
  
Changes in version 1.2
  * Null deviance corrected for d != 0
