Collective.editmodeswitcher

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- Nothing changed yet.

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- Drop Plone 4.1 support. [jone]
- Add Plone 5.1 support. [tinagerber]

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- Provide plone.app.caching etag "editmode". [jone]

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- Implement traversable get_state method, which returns the curren edit-mode state.
[mathias.leimgruber]

- Use ftw.testbrowser for testing.
[mathias.leimgruber]

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- General package clean up:
Update Readme, update metadata, testing, declare dependencies

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- Initial release