Redturtle.portlet.collection

------------------

- Nothing changed yet.

------------------

- major refactoring for python 3.8 and plone 5.2.
[reflab]

----------------

- update metadata in setup.py and history
[lucabel]

------------------

- Plone 5 compatibility. For Plone < 5 use 0.x versions
[cekk]

----------------

- skip first n element
[mamico]

----------------

- Now compatible with the new feature introduced with plone.portlet.collection 2.1.6
(shipped with Plone 4.3.4)
[keul]
- Do not display "None" CSS class
[keul]
- Image grabbing works also for Plone sites not in the VHM root
[keul]
- Add reference field relate to images; in this way user it's able to add header image to collection
[lucabel]
- Fix rss icon
[lucabel]
- Added italian portlet name translation
[lucabel]