Using gl3n.linalg through an adapter module (with our own aliases).
GUI can now be disabled in demo.
Better math @safety.
Avoiding multiple simultaneously bound vbuffers/ibuffers/shader
Framebuffer sets up its viewport.
Color @safety and fromVec4 (inverse to toVec4)
Image: better setPixel/getPixel, downsampling, formatting fixes.
Prerenderer now supports supersampling (antialiasing).