e6d8d07eae31b778522785b4dd5699aaa1e2d1da Dev: Add a data-dt-column …

…attribute to the `colgroup>col` elements

This can be useful for debugging, but isn't actually used for anything
more than that at the moment.

Sync to source repo @e6d8d07eae31b778522785b4dd5699aaa1e2d1da

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.0.3",
-    "last-sync": "2a5b9b9791b7711947ef823455e580c9c96f3816"
+    "last-sync": "e6d8d07eae31b778522785b4dd5699aaa1e2d1da"
 }