PRTOOLS4TO5

    PRTOOLS4TO5(DIRIN,DIROUT)

Copies all files in the directory DIRIN into DIROUT.  Convert all occurances in DIROUT of calls to

     dataset, datafile, mapping, map, pca and crossval

to

     prdataset, prdatafile, prmapping, prmap, pcam and prcrossval

This routine may not be full proof. Result should be checked.