add drawing lib, improve simple V

[crthpl]

This improves the simple V @spytheman made by increasing the thickness and making it the blue V color. In addition, there is a simple drawing lib that can be used to set the color at x, y coordinates (with bounds checking), and also draw rectangles. One thing I noticed was that the build flags had -O3 which greatly slowed down compilation, and the runtime happened pretty much instantly anyway with -O0 (This project is still very small).

TODO:

• [ ] Optimization for rect
• [ ] Lines
• [x] Circles

[JalonSolov]

-O3 is turned on for -prod builds, and should stay on for that.

[mintsuki]

Looks good

[crthpl]

It was difficult to keep this up-to-date with the main vos.