Eke.committees

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* Made compatible with Plone 4.2.4

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* Made compatible with Plone 4.1.5.
* CA-1001 - Put Group Spaces under Committees and ingest via RDF

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This release includes:

* Depending on just Plone the framework instead of Plone the application.

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This release boosts test resiliency.

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This release updates the chair and co-chair of collaborative groups as
committees are ingested from RDF.

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* Re-attaches members of committees of type "Collaborative Group" to any
name-matching "Collaborative Group" objects (from edrnsite.collaborations) in
the portal. You should re-ingest committees to do this re-attachment
whenever you re-ingest sites (because the site ingest destroys People
objects).
* Uses the modern plone.app.testing framework.
* Collaborative Groups are now hidden.