v0.62.0 OpenGL at last

Say goodbye to jaggies, it's smooth sailing (and rasterization) from here on out!

I finally got round to getting my rendering to work on OpenGL.
This lets me do things like animation smears really easily.

I'm not sure what the compatibility is like for graphics cards, but if it doesn't work you can hit F6 to toggle software rendering.

Download from the Github repo

Oliver Marsh,
Nice! I would love to hear how you render the shapes. Do you write a shader for getting the anti-aliased shapes or use msaa for it, or something else?