version 1.00    first release (German docs only)
version 1.10    included user defined confidence levels
version 1.20    rewrote comments and docs to English
version 1.21    fixed a bug in the rescaling routine
version 1.21a   added the variant 'muin2ser'
version 1.21b   added compiled binaries for SunSparc, DEC 5000, HP 9000 
                and IBM 6000
