Now checks to see if all 5 top choices are chosen. If so, then all subsequent rankings are 100
Added logging
Now able to read in XLS survey responses to a Data object. Also able to write results to a XLS document.
Added in one Survey Monkey header that was previously missed.
Contains the Data_b class, which is a simpler version of Data. Whether Data or Data_b is used depends on the format of the initial rank matrix: Is it (n x 5) or (5 x n)?