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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]