New: UIKit integration tech preview for DataTables

- Many thanks to jthsiao at Google for the initial integration work
- Example added
- CSS decompiled to SCSS as it has a bit more structure
- Removed the TableTools integration since TableTools is now retired
- Reduce the gap between the table grid components
- Use single arrow for previous / next paging

Weirdly the UIKit documentation examples don't appear to match up with
what you get if you actually use the UIkit distribution code - see
https://github.com/uikit/uikit/issues/1739 . As such the UIKit /
DataTables example doesn't look as nice as might be expected.

examples/basic_init/scroll_xy.html

@@ -902,6 +902,9 @@ $(document).ready(function() {
 							<li>
 								<a href="../styling/material.html">Material Design (Tech. preview)</a>
 							</li>
+							<li>
+								<a href="../styling/uikit.html">UIKit (Tech. preview)</a>
+							</li>
 						</ul>
 					</div>
 					<div class="toc-group">