Insert DistributionFitting object that can fit statistical distributions with Maximum Likelihood Estimation and Kolmogorov-Smirnov distribution fitting test in a given data sample

Insert the ExcelOutput object that outputs the results from the calculation of statistical measures and distribution fitting statistical test in a given data sample

Insert two scripts, ImportExceldata to import data from Excel files and ReplaceMissingValues to replace the missing values in a data sample

It's probably better to have a new description field for this

but list all the properties instead

TODO: the GUI will have to make it a float too