v0.5.7, 2016-12-?? -- Spark
 * All runners:
   * JarStep.{INPUT,OUTPUT} are deprecated (use mrjob.step.{INPUT,OUTPUT})
 * deprecated mrjob.parse.parse_*_list() functions
 * deprecated mrjob.parse.scrape_options_into_new_groups()
 * deprecated non-strict protocols (#1452)
 * deprecated python_archives (#1056)
