0.3.3
Fixes #7 - 'null' printed during testing.
  Wrapped console.error logging in if-statements.
Fixes #8 - testing takes 30s to actually end.
  Identified a bug in `ws`.  Created issue 343
  (https://github.com/einaros/ws/issues/343)
  Also created Pull request 342 to resolve it.
  (https://github.com/einaros/ws/pull/342)
  Also updated wisper server to avoid the buggy use case
  (don't close server connections manually - the `ws`
  server will close them a second time and leak timeouts)