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- Add method ``tool.hasUpgrades``.
This is more efficient than checking if ``tool.listUpgrades`` returns a non-empty list.
- Add options ``dest`` and ``simple`` to ``tool.listUpgrades``.
Use this to simplify the ``upgradeProfile`` method.
- Fix 118: Import handler not found .
(`118 <https://github.com/zopefoundation/Products.GenericSetup/issues/118>`_)
- Allow passing ``quiet=True`` to ``upgradeProfile``.
Then we do not complain when the profile is not installed or needs no upgrade.