Collective.fbshare

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- Nothing changed yet.

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- Fixes for Plone 5.0 (handle missing portal_properties props and unset lead
images)
[alecm]

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- Updated metadata from sc.social.like with latests
changes from version 2.0 (matters only when used).
This close `7`__
[keul]

__ https://github.com/RedTurtle/collective.fbshare/issues/7

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- Dexterity content type support [keul]
- Display also the modified time if security site say so [keul]
- Coexistence with *sc.social.like* [keul]
- Properly handle ``article:tag`` as array [keul]

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- When visiting a folderish content refers to folder URL, not default
page URL (close `2`__) [jnachtigall]

__ https://github.com/RedTurtle/collective.fbshare/pull/2

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- Use of site logo feature for ``og:image`` was broken
[keul]
- i18n fixes
[keul]
- added support for content's own image (also with support for *collective.contentleadimage*)
[keul]