v1.21.2

-- Step 2 of changing the way Homer3 stores the group data in memory, how it saves processed data and loads processed and acquired data. Finish getting rid of all remaining code related to the previous solution to the problem of loading and keeping a large data set in memory; a half-measure which calculated dc and dod automatically when Homer3 starts up by sensing that there's derived data that was previously calculated in groupResults.mat.

-- Clean up Calc() method a little bit in preparation for new solution to the above-described problem

-- Add foolproof functionality to ConfigFileClass to be able to restore original config file instead of rewriting AppSettings with same parameters simply make a backup copy whenever you save the config  file and use the new Restore method to get back to original version. That way whenever we run the unit test version control will not show that the file changed even though the substance is same as original.

-- Add code to unit test to be able to call clean up when user interrupts it.

-- Make version2string - converting version cell array return by getVernum to string - a simpler and more robust function.

-- Add DesignNotes.odp OpenOffice version and add 2 diagrams if how the dataTree works