Second pass at adding key files

site/forum/include_message_display_infobar.html

@@ -0,0 +1,11 @@
+<%~if preview%><%current%><%endif%>
+<div id="message_info_<%msg_id || 'preview'%>" class="post-info">
+  <div class="username">
+    <%~set include_username_display = $message_username%>
+    <%~include include_username.html~%>
+  </div>
+
+  <div class="message-date bottom-message-date">
+    <%msg_date%>
+  </div>
+</div>