Collective.portlet.collectionfilter

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- removed EMPTY indexer
[agitator]


- Plone 5 style portlet markup
[agitator]

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- Update AJAX selectors to content-core and default value for caching
[agitator]

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- Fix AJAX loading of collectionfilter result to use the content node instead of whole document.
[thet]

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- Set the 'selected' class on clicked collectionfilter link via JavaScript.
[thet]

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- Plone 5 compatibility.
[agitator]

- Ajaxification with mockup, if available.
[agitator]

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- Make cache time configurable and set it to 60 seconds instead of an hour.
0 is no caching.
Remove profiling code.
[thet]