Redturtle.volto

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- Custom search endpoint to fix bug with Access inactive portal content permission
(https://github.com/plone/plone.restapi/pull/1066)
[cekk]

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- Customize robots.txt to disallow /api entry.
[cekk]

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- Patched Products.PortalTransforms
(https://github.com/plone/Products.PortalTransforms/pull/43).
[cekk]

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- Re-add remoteUrl field serializer.
[cekk]

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- [new] Add here from modena the RSS.pt template override
[lucabel]
- Remove text block serializer that is already merged into plone.restapi.
[cekk]
- Register generic serializer also for site root.
[cekk]

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- Add exclude_from_nav as Collection criteria (used also in Volto's listing blocks).
[cekk]
- Add custom TextLine adapter to return the proper widget for **remoteUrl** field.
[cekk]