Products-cmfdynamicviewfti

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- Merged z3-views-integration branch.
[svincic]

- Making use of Zope 3 interfaces with proper reverse bridges.
[optilude]

- Fix tests to pass if Five/Zope3 is installed.
[hannosch]

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- Made 'safe_callable' truly safe by using 'safe_hasattr'.
- Made tests use CMFTestCase. There is no Plone dependency whatsoever.
- Fixed a bug in getViewMethod. A present, but empty 'layout' attribute
now also returns the default view instead of ''. Returning the empty
string sends PortalContent.__call__() into a loop.
[stefan]

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- Added conditional import for typeClasses to make the code CMF1.6
compatible while staying CMF1.5 backwards compatible.
[hannosch]

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- Change getViewMethod's 'enforce_available' argument to default to False
instead of True. If someone goes to the trouble of either using python
or adding a property to indicate a specific template as the default
layout, we should let them.
[rafrombrc]

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- Improved Plone 2.1 integration: getDefaultPage. Replace try/except with a
better checking for Plone. Bonus: whitespaces cleanup.
[deo]

- Stop Acquisition for default_page.
[panjunyong]

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- Initial release.