Added samples from the Organizing Data patterns.  Also changed the project type as a whole, since one of these patterns is UI-based and we needed a simple WinForms UI.  Though that pattern is still unfinished in this sample code simply because translating it from 14-year-out-of-date Java to relatively modern C# was a bit wonky.  It's entirely based on bindable/observable/etc.erable things, which have evolved a LOT over the years.  We might just drop that pattern from the exercises entirely.