Twisted 15.3.0 MRO breakage

[mithrandi]

  File "/home/mithrandi/code/axiom/axiom/scheduler.py", line 230, in <module>
    class _SiteScheduler(object, Service, SchedulerMixin):
  File "/home/mithrandi/deployment/virtualenvs/Axiom/local/lib/python2.7/site-packages/zope/interface/advice.py", line 141, in advise
    newClass = meta(name,bases,cdict)
exceptions.TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases object, Service, SchedulerMixin

This happens because Service inherits from object in Twisted now.