Kazan v0.7.0

Changes

• Kazan.run now pattern matches on argument types, so if a user accidentally
  passes a {:ok, request} to it, they'll get a better error message.
• Kazan.Watcher no longer logs debug info by default. This is now controlled
  with a debug option that defaults to false.
• Pulled in the k8s 1.9.6 specifications.
• Support HTTPoison 1.0 as well as 0.x

Bug Fixes

• Handle the breaking change to YamlElixir.read_from_file in YamlElixir 1.4.0
• Token & certificate auth details can now be supplied in the mix config.