First stab at new user education - configurable messages that pop up on a user's first

few posts/topics.

app/serializers/current_user_serializer.rb

@@ -6,7 +6,8 @@ class CurrentUserSerializer < BasicUserSerializer
              :admin?, 
              :notification_channel_position, 
              :site_flagged_posts_count,
-             :moderator?
+             :moderator?,
+             :post_count
 
   # we probably want to move this into site, but that json is cached so hanging it off current user seems okish
 
@@ -14,6 +15,10 @@ class CurrentUserSerializer < BasicUserSerializer
     object.admin
   end
 
+  def post_count
+    object.posts.count
+  end
+
   def moderator?
     object.has_trust_level?(:moderator)
   end