Xm-booking

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- Nothing changed yet.

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- Moved to github.
[maurits]

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- Added missing return statement in the size_estimate indexer.
You may want to recatalog the Stories to fix their size_estimate.
[maurits]

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- Made booking table compatible with both Plone 3 and 4, by using
either poi_niceName (Plone 3, Poi 1.2) or pas_member (Plone4).
[maurits]

- Explicitly load the permissions.zcml file from
Products.eXtremeManagement, otherwise you might get a
ComponentLookupError on zope startup.
[maurits]

- Added z3c.autoinclude.plugin target plone.
[maurits]

- Use plone.indexer instead of the deprecated
registerIndexableAttribute which no longer works in Plone 4. Added
dependency on plone.indexer for this, so using Plone 3.3 is
recommended (might still work on earlier versions).
[maurits]

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- Avoid renaming bookings that were added via the tracker at the
moment you edit them.
Fixes http://plone.org/products/extreme-management-tool/issues/184
[maurits]

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- Protect the booking table with the eXtremeManagement: View Details
permission. [maurits+mike]