UPGRADING

 *  Change imports of `ginkgo.config.Setting` to `ginkgo.Setting`
 *  Change imports of `ginkgo.core.Service` to `ginkgo.Service`
 *  Use `.ready` instead of `.started` on Service objects
 *  The `doc` named argument of Setting is now `help`
 *  If you access settings outside of classes like this:

      Setting("setting").value

    Then you should just import ginkgo and do this:

      ginkgo.settings.get("setting")

 *  If you use any gevent-based server (based on baseserver,
    StreamServer, etc), you need to explicitly wrap it when adding
    to a service using ginkgo.async.gevent.ServerWrapper. For
    example, this code:

      from gevent.server import StreamServer
      class MyService(Service):
        def __init__(self):
          self.server = StreamServer(...)
          self.add_service(self.server)

    Would need to become:

      from gevent.server import StreamServer
      from ginkgo.async.gevent import ServerWrapper
      class MyService(Service):
        def __init__(self):
          self.server = StreamServer(...)
          self.add_service(ServerWrapper(self.server))