v1.3.0

• Allowed Manhole to be configured without any thread or activation
  (in case you want to manually activate).
• Added an example and tests for using Manhole with uWSGi.
• Fixed error handling in manhole-cli on Python 3 (exc vars don't
  leak anymore).
• Fixed support for running in gevent/eventlet-using apps on Python 3
  (now that they support Python 3).
• Allowed reinstalling the manhole (in non-strict mode). Previous
  install is undone.