Don’t style non-reST tables the reST way

Signed-off-by: Chris Warrick <kwpolska@gmail.com>

nikola/data/themes/base/assets/css/rst_base.css

@@ -238,17 +238,17 @@ pre.code {
 pre.code .ln { color: gray; } /* line numbers */
 
 /* Tables */
-table { border-collapse: collapse; }
-td, th {
+table.docutils { border-collapse: collapse; }
+table.docutils > td, table.docutils > th {
   border-style: solid;
   border-color: silver;
   padding: 0 1ex;
   border-width: thin;
 }
-td > p:first-child, th > p:first-child { margin-top: 0; }
-td > p, th > p { margin-bottom: 0; }
+table.docutils > td > p:first-child, table.docutils > th > p:first-child { margin-top: 0; }
+table.docutils > td > p, table.docutils > th > p { margin-bottom: 0; }
 
-table > caption {
+table.docutils > caption {
   text-align: left;
   margin-bottom: 0.25em
 }