working makefile
I have decided to upload all of my older versions of pong_3d,
mostly because I actually have them on hand. So I will temporarily
replace the current source file with these older versions and
try to write a brief description of the changes.

version 0: creates a window and a moving ball
version 0.0.1: attempts to show score, doesn't compile on linux
because of itoa
version 0.0.2: I have decided to no longer describe the changes
because I'm working on linux right now, and itoa doesn't work
version 0.0.3
version 0.0.4
version 0.0.5
version 0.0.6
version 0.0.7: removed itoa and speed adjustments
apparently somewhere in the last 6 versions, I added camera
tilting based on mouse
version 0.1.0: it is now reverted back to what it was an hour ago
wrote a readme, prints license at start of game, and updated license with game name, because for some reason git's defaults put the game DESCRIPTION instead of the NAME in the example disclaimer part