Fixed achievement recalculation to work from the command line.

scripts/recalculateAchievements.coffee

@@ -8,6 +8,7 @@ do (setupLodash = this) ->
   GLOBAL._ = require 'lodash'
   _.str = require 'underscore.string'
   _.mixin _.str.exports()
+  GLOBAL.tv4 = require('tv4').tv4
 
 database.connect()
 

server/achievements/earned_achievement_handler.coffee

@@ -7,6 +7,7 @@ User = require '../users/User'
 Handler = require '../commons/Handler'
 LocalMongo = require '../../app/lib/LocalMongo'
 util = require '../../app/core/utils'
+LevelSession = require '../levels/sessions/LevelSession'
 
 class EarnedAchievementHandler extends Handler
   modelClass: EarnedAchievement