2012-12-16 Albart Coster * Function read.IPGPedigree is removed, this was a function to read a very specfic pedigree file. * Function errors.ped is removed, the code of this function is now included in function orderPed. * Function orderPed now checks for errors in the pedigree. Easy errors, which previously could be controlled with function errors.ped are detected (duplicate animals, animals with two sexes). Loops in the pedigree will not cause crashes anymore but will be reported to the user. The user remains responsible for identifying and solving these errors.