## version 1.0.5
    # change random number generation using cholesky decomposition instead of eigenvalue decomposition
    # remove write down options, only useful for debugging
## version 1.0.3
    # debugging option in data generation, to test over platforms 
        * fix seed type
        * add option to write down intermediate output to debug data generation
## version 1.0.0
    # first version for CRAN with vignette
