SemanticResultFormats datatables upgrade (KM-A)

[thomas-topway-it]

This PR is made in reference to: KM-A Knowledge Management Associates upgrade of SemanticResultFormats Datatables
This PR addresses or contains:

• upgrade of Datatables to 1.12.1, Buttons 2.2.3, Select 1.4.0
• fixes DataTables format: Image links a being replaced in the wrong column #188
• fixes [filtered] switching view in filtered format should improve accessibility #726
• fixes FR: Datatables class should have configuration of pageLength #721
  (added parameters: pagelength and lengthmenu)
• fixes Datatables: URL type destroys complete table #93
• (datatables) added support for basic theme
• adds play/pause button on slideshow navigation
• adds a new result format (carousel based on slick)
• updates Javascript tests for Datatables format, and integration tests for Carousel format
• fixes [datatables] ignores collation setting for numerical sorting #750

[krabina]

This PR is still work in progress. Will let you know when we are finished.

[krabina]

We believe or PR is ready now for integration. We improved the datatables format, fixed serveral bugs, added a new carousel format and provide php unit tests, json integration tests, and js QUnit tests.
We have tested on several production wikis on 1.35.
@JeroenDeDauw @gesinn-it-gea are we ready to merge?

[kghbln]

proto docu at https://www.semantic-mediawiki.org/wiki/Help:Carousel_format