Instead of saving, only set fault property when receiving fault response.

db.coffee

@@ -56,15 +56,7 @@ updateTask = (task, callback) ->
   )
 
 
-saveTask = (task, callback) ->
-  task._id = mongo.ObjectID(String(task._id))
-  tasksCollection.save(task, (err) ->
-    callback(err)
-  )
-
-
 exports.mongo = mongo
 exports.memcached = memcached
 exports.getTask = getTask
 exports.updateTask = updateTask
-exports.saveTask = saveTask