Overhaul of unit tests

This included the overhaul of unit tests. A number of unit tests. Here's a quick informal summary. More complete details will be added in the Milestone report.

I addition to modifying and adding to all unit tests a 2nd file was added for use with unit tests. We used this to add additional unit tests with the testing file as our input, similar to how the group did their first set of unit tests. However, some of their unit tests were incorrect, & in addition they only had 1 unit tests per function. I have corrected the incorrect unit tests and also added an additional unit test for each method from the 2nd file to make the unit tests per feature a little more robust.