Will not build with current version of routine libraries

[megidont]

Hey! Love your work! Me and some friends wanted to edit your screensaver, so step one was obviously getting it compiled. I've emerged on the other side a different person, more jaded than before.

For starters, many of the functions used in main.c are simply not included in versions 2.2 and beyond; I had to track down by searching for a commit that actually still had _r_math_rand rather than _r_math_getrandomrange. After that, I had to make some changes to the outdated resource.rc file -- it includes the headers as .hpp instead of .h, and seems to not have a definition for _APP_WEBSITE_URL (which I set to this repository) or _APP_AUTHOR (which I simply changed to the already defined APP_AUTHOR).

After rectifying these issues, I was able to get it compiled and running. However, I am submitting this as an issue instead of a pull request with my code because my code was sloppy, hacky, and not worthy of your codebase; I was more concerned with finding a solution for now instead of a solution forever.

Thank you so much for all the development work you do, and I wish you good luck in your projects to come!