initial master side P4() source step
removed defaultBranch argument which has no purpose. Improved API docs. Added P4:.. prefixing on logging.
added docs for P4 master side source step
address jaredgrubb's pull feedback
- set compare_attrs to be accumulateClassList()  [wip]
- turn compare_attr into an accumulatedClassList.
- Fixed spelling.
- compare_attrs belongs to self.
- Revert all changes except the first.
- Added accumulate(self) method.
- Added self.accumulate() method to accumulate compare_attrs.
- test_equality_unimportantDifferences_subclass needs to be changed since b123 no longer equals to b223.
- removed accumulate().  Changed ComparableMixin to statelessly use accumulatedClassList.
- Import reflect, instead of importing the function.
Initial GitHub status receiver.
Added basic HTTP auth for /change_hook/github
Added information about ``change_hook_auth`` option
Small fix in documentation about ``change_hook_auth``
unit test 'buildbot --verbose' cli option

Test that '--verbose' option for buildbot command enables
logging to stderr.
Remove redundant space