Move testing posts to their own section

blog/static/css/main.css

@@ -67,6 +67,10 @@ main img {
   border: 2px solid #66f;
 }
 
+.posts.testing {
+  border: 2px solid #0c0;
+}
+
 .posts.memory-management {
   border: 2px solid #cc0;
 }
@@ -102,6 +106,10 @@ main img {
   color: #55d;
 }
 
+.post-category.testing {
+  color: #090;
+}
+
 .post-category.memory-management {
   color: #990;
 }