Add option to generate a list of values from Dataframe or Numpy array

[labay11]

Implement functions that generate a Pandas Column out of a dataframe where a given column is the value and another the uncertainty. Similarly, convert a numpy array whose last dimension is equal to 2 to an array of Values where the first element in the last dimension is the value and the second the uncertainty.

Other features: generate a random matrix of values with a scale factor for the uncertainty.