rebase, add table example

Author: andrewseguin

src/lib/sort/sort.md

@@ -30,4 +30,6 @@ To prevent the user from clearing the sort sort state from an already sorted col
 #### Using sort with the md-table
 
 When used on an `md-table` header, it is not required to set an `md-sort-header` id on because
-by default it will use the id of the column.
+by default it will use the id of the column.
+
+<!-- example(table-sorting) -->