Add people plugin (#48)

source/templates/classic/style.css

@@ -85,7 +85,6 @@
 
 /* User avatar */
   .avatar {
-    background-color: #000000;
     border-radius: 50%;
     margin: 0 6px;
   }
@@ -503,6 +502,15 @@
     -webkit-box-orient: vertical;
   }
 
+/* People */
+  .people {
+    padding: 0 10px;
+  }
+
+  .people .avatar {
+    margin: 0 2px;
+  }
+
 /* Fade animation */
   .af {
     opacity: 0;