* preload at top of page for resources ala flipkart
* marketing points — cost of aquisition, boosts from switching
to PWA.
* sites to copy — NASA website + polymer shop but for Packard cars
* On GraphQL errors — print the query plus where it came from and give
  them the link to debug it in GraphiQL
* AggressiveSplitPlugin — limit max chunk size to 250kb.
* SW render-dom-stream and stream HTML to browser.
