revamped handling of unread messages, so that a socket call is made to all socket clients whenever a new unread message is available. Prior behaviour had the unread count updated via ajax call on ajaxify (which was clumsy at best and didn't update automagically)

src/posts.js

@@ -149,6 +149,9 @@ var RDB = require('./redis'),
 							next();
 						});
 					},
+					function(next) {
+						topics.pushUnreadCount(null, next);
+					},
 					function(next) {
 						Posts.getCidByPid(postData.pid, function(err, cid) {
 							if(err) {