Migrate off of brfs to a webpack loader which supports sourcemaps

[Nolski]

If you import react-canvas and compile it using webpack you'll lose any hope of having sourcemaps to go along with your work due to brfs not supporting it. I'm fairly new to this code base but it doesn't like you are doing anything that you need transform-loader for. This is a pretty big dependency and with a little guidance, I'd be happy to try and pull it out.