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*Warning*: The seantis.reservation release 1.2.0 changed a lot internally,
which is why you can't directly upgrade from seantis.reservation releases
prior to 1.0.12 (September 27th, 2013) to the 1.2.0.
If you do have such an old release, install seantis.reservation 1.1.5 first,
run all upgrade steps, and then install 1.2.0.
- Moves the core to a new, plone-independent Python Module (Libres).
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