Plone-behavior

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- Fix tests for Zope 2.12
[optilude]

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- Changed API methods and arguments to mixedCase to be more consistent with
the rest of Zope. This is a non-backwards-compatible change. Our profuse
apologies, but it's now or never. :-/

If you find that you get import errors or unknown keyword arguments in your
code, please change names from foo_bar too fooBar, e.g.
enumerate_behaviors() becomes enumerateBehaviors().
[optilude]

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- Allow a marker-interface-only behavior to be set by using the 'provides'
attribute (previously 'interface') in the <plone:behavior /> directive
without a 'factory' attribute. The 'marker' attribute (previously known as
'subtype') is now only required if there is a marker used in addition to
a behavior adapter with a separate interface ('provides') and factory.
[optilude]

- Rename the 'interface' attribute of <plone:behavior /> to 'provides' to
be more consistent with the <adapter /> directive. This is a backwards
incompatible change!
[optilude]

- Rename the 'subtype' attribute of <plone:behavior /> to 'marker' to
be more explicit about its purpose. This is a backwards
incompatible change!
[optilude]

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- Allow behaviors with no factory.
[alecm]

- Provide a vocabulary of available behaviors.
[davisagli]

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- Initial release