Nesting tables

* Add simple test to css-tests.html
* Scope .table-bordered to immediate children th/td elements only

Author: mdo

docs/assets/css/bootstrap.css

@@ -2044,31 +2044,31 @@ table {
   border-top: 0;
 }
 
-.table-bordered thead:first-child tr:first-child th:first-child,
-.table-bordered tbody:first-child tr:first-child td:first-child {
+.table-bordered thead:first-child tr:first-child > th:first-child,
+.table-bordered tbody:first-child tr:first-child > td:first-child {
   -webkit-border-top-left-radius: 4px;
           border-top-left-radius: 4px;
   -moz-border-radius-topleft: 4px;
 }
 
-.table-bordered thead:first-child tr:first-child th:last-child,
-.table-bordered tbody:first-child tr:first-child td:last-child {
+.table-bordered thead:first-child tr:first-child > th:last-child,
+.table-bordered tbody:first-child tr:first-child > td:last-child {
   -webkit-border-top-right-radius: 4px;
           border-top-right-radius: 4px;
   -moz-border-radius-topright: 4px;
 }
 
-.table-bordered thead:last-child tr:last-child th:first-child,
-.table-bordered tbody:last-child tr:last-child td:first-child,
-.table-bordered tfoot:last-child tr:last-child td:first-child {
+.table-bordered thead:last-child tr:last-child > th:first-child,
+.table-bordered tbody:last-child tr:last-child > td:first-child,
+.table-bordered tfoot:last-child tr:last-child > td:first-child {
   -webkit-border-bottom-left-radius: 4px;
           border-bottom-left-radius: 4px;
   -moz-border-radius-bottomleft: 4px;
 }
 
-.table-bordered thead:last-child tr:last-child th:last-child,
-.table-bordered tbody:last-child tr:last-child td:last-child,
-.table-bordered tfoot:last-child tr:last-child td:last-child {
+.table-bordered thead:last-child tr:last-child > th:last-child,
+.table-bordered tbody:last-child tr:last-child > td:last-child,
+.table-bordered tfoot:last-child tr:last-child > td:last-child {
   -webkit-border-bottom-right-radius: 4px;
           border-bottom-right-radius: 4px;
   -moz-border-radius-bottomright: 4px;