Adding styling for tables. (#81)

Author: samueleresca

theme/src/main/assets/assets/stylesheets/pekko-theme.css

@@ -80,3 +80,16 @@ pre:hover .snippet-button.go-to-source::before {
 a.snippet-button.go-to-source:hover::before, .snippet-button.go-to-source:active::before {
   color: #ff9100;
 }
+
+/* style for tables */
+tbody th {
+  font-weight: bold;
+}
+
+tbody th, tbody td {
+  padding: 5px;
+}
+
+tbody tr:nth-child(even) {
+  background-color: #eaeaea;
+}