MXWxrd Unit Tests Update 1

First impulse was to look at the package.json file as it currently stands, to see what tests came along for the ride when we cloned from dssf in the first place (see previous post). That reminded me that there is already a full test suit for the Djehuti spec in dssf, so I'm just gonna be adding to that as it stands (I like to stick to the "leave working code alone" rule whenever possible and just write along side what is already there.)