GitLab

* develop:
  separate out arrows var from settings object
  Handle arrow display dynamically
  Deploy from Travis
  Adjust nitpicks, remove whitespace in (), add around +
  display title and extras differently
  Add registration component to `JOIN SCRATCH`
  Explicitly set `Accept-Language` to cookie lang
  Remove the session listener on unmount
  Localize the welcome panel
  Update spacing on Splash page elements
  Handle sentry config and express routing/page handling errors, to do: handle uncaughtExceptions
  Handle sentry config and express routing/page handling errors, to do: handle uncaughtExceptions
  Update entire Tutorial cards to be clickable
  Add window.Intl polyfill. Resolves GH-96
  Override `Slider`'s `arrows` setting by row length
  use ellipsis if text overflows and urlify username
  Test the build when we test our build
  Default admin panel to closed
  Set 'black' default props for thumbnails and carousel
  Remove localhost from api call for message count