• Make note of num_results property in iterator documentation (#2944) Hat tip to @bendemaree
• All other changes were "non-public" but a few in particular are worth noting:
• The non-public Connection base class no longer holds any state (#2970)
• Connection classes may be re-factored, so the base Client() class does not directly create them (#2870)

PyPI: https://pypi.python.org/pypi/google-cloud-core/0.23.0