gatsby 1.0.0-alpha15

React Router V4 upgrade, static directory, bug fixes, tests, etc.

on Node.js Yarn

Added

• Update version of React Router to v4 #940
• API proxy for use during development #957
• "static" directory for files to be copied directly into the "public"
  directory #956
• Add toFormat argument to the ImageSharp GraphQL type so can change
  format of image e.g. from png to jpg.
• React Docgen transformer plugin for parsing propType info from React
  components #928

Changed

• Change node format to hide most node-specific fields under an "internal"
  key. Any code referencing node.type and others will need changed to
  node.internal.type #960
• Changed the id for the root <div> used by Gatsby to mount React to ___gatsby
• The default layout component should be at layouts/index.js not layouts/default.js #940 (comment)
• this.props.children in layout components is now a function #940 (comment)
• Change the default port for serve-build to 9000
• Change the path to GraphiQL to /___graphql

Chore

• Upgrade Jest to v20 #935