Add support of organization events #86
Description
Would be nice to have repository added message.
However, now even ping event does not work.
debug() Ping event payload taken {'zen': 'Design for failure.', 'hook_id': 291349016, 'hook': {'type': 'Organizati
debug() Cannot process PingEvent payload because of 'repository'
debug() Cannot handle request from GitHub: 'NoneType' object has no attribute 'full_name'