This may be controversial but it we're doing it. Having code formatting needs to be consistent
and a non-issue during code review. I'm willing modify the configuration if people see a strong
need, but formatting needs to be present and enforced.
made GHHook abstract and created two concrete subclasses for org
and repo hooks. Created utility class GHHooks to manage creation
and retrieval of org/repo hooks with minimal code duplication. These
are invoked by GHOrganization and GHRepository respectively.
