message: Adding Windows self check script to docs.
diff: @@ -153,6 +153,9 @@ TensorFlow}.
  If the system outputs an error message instead of a greeting, see [Common
  installation problems](#common_installation_problems).
  +There is also a helpful [script](#https://gist.github.com/mrry/ee5dbcfdd045fa48a27d56664411d41c)
  +that helps with Windows TensorFlow installation issues.
  +
  ## Common installation problems
  We are relying on Stack Overflow to document TensorFlow installation problems
  