• @antoniocapelo noticed that while our README promised you could override plugins like you can override loaders... we hadn't defined core plugins with webpack-configurator (the lib that makes it easy to override Gatsby's webpack config in userspace) and then submitted a PR to fix this! Thanks! #626
• @jbolda added postcss to the loader stack for Sass/Less so they can take advantage of the prefixing built in to our postcss config. https://github.com/gatsbyjs/gatsby/pull/628/files