Merge #548: Port asset tutorial, update to 0.17+ API

4c157da Port asset tutorial, update to 0.17+ API (Gregory Sanders)

Pull request description:

  cc @wintercooled

  I didn't port the bash version because I don't feel like rewriting everything to work in bash.

  resolves #546

Tree-SHA512: b1ce9180dc49d5cba0eeba8813e03f486c73f7d3786a85e8aa698eeb5146afb6a89dd9a48611364261937d246368c46843d6666d7eea6b64f7800557e47d083f

Author: stevenroose