P-Fea Lesson 2 and Source Update

I just published the second lesson in the P-Fea course. I’ve heard from more than one person that I used github incorrectly when I uploaded the source in zip files. Sorry! I’m new to this open-source game. I’m working on fixing that with proper repositories, which should be available later today. They will still require the use of visual studio to compile. I verified that they work with the last free version, VS2019 community. Next I’ll be working on providing makefiles so they can be built from the command line on both windows and Linux.