Collective.folderorder

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- Support drag and drop ordering in reversed mode.
[thet, 2012-11-20]

- Provide custom implementation for getObjectPosition to return reversed
ordering. So plone.app.folder.nogopip.GopipIndex also returns the correct
order for getObjPositionInParent queries (E.g. for navigation portlet and
global_sections viewlet).
[thet, 2012-11-20]

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- upgrade to use yafowil.plone
[jensens, 2012--3-20]

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- returned value must have a length, fixed this. [jensens, 2011-12-20]

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- make it work [jensens, 2011-09-09]