WIP on user achievements

+ Add MCI codes for points/count
+ Add docs for MCI codes
+ Record in stats, stat log, etc.
* Do not trigger more than once
* Code cleanup & organization, add classes, etc.
* Tweaks to DB table

core/user_property.js

@@ -49,5 +49,8 @@ module.exports = {
     MessageConfTag              : 'message_conf_tag',
     MessageAreaTag              : 'message_area_tag',
     MessagePostCount            : 'post_count',
+
+    AchievementTotalCount       : 'achievement_total_count',
+    AchievementTotalPoints      : 'achievement_total_points',
 };