Added ability to render quads

[tlgkccampbell]

I am a bit concerned about this addition. My understanding is that GL_QUADS was deprecated in OpenGL 3.0. Furthermore, most other graphics APIs with which I am familiar don't support rendering quads natively, which would make this difficult to port if I ever write an alternative graphics backend.

What is your use case which requires this?

[Scellow]

I'm porting an old SFML project and used quads, easier to use 😄

But if is deprecated then yeah you are right, no reason to add it

[tlgkccampbell]

Closing as per discussion above: see this StackOverflow post.