Collective-sortmyfolder

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* Set the icon_expr in actions.xml so we register the action icon in
the preferred way in Plone 4. We keep actionicons.xml for backwards
compatibility with Plone 3.
[maurits]

* No longer use the plone domain for our action as portal_actions
accepts other domains too. This means we no longer need the i18n
directory. Added an upgrade step to switch our action to use
collective.sortmyfolder as domain.
[maurits]

* Added MANIFEST.in so .mo files can be included in the release
(automatically when using zest.releaser+zest.pocompile).
[maurits]

* Made compatible with Plone 4.1.
[maurits]

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* Updated Dutch translations [fvandijk]
* Corrected english spelling in README.txt [fvandijk]

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* added new dates sorting criteria [keul]
* added the field for a custom way to sort [keul]
* do not show the menu entry if you can't sort the current object [keul]
* added some javascript for the new custom field.
Not enabled js browser will no be able to use the new feature [keul]
* tested also on Plone 4

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* fixed typo syntax error in english text [markvl]
* added dutch translation [markvl]

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* initial release