Remove addAttribute, not sure why it was left in

lib/dao.js

@@ -611,14 +611,6 @@ module.exports = (function() {
     return result
     return result
   }
   }
 
 
-  DAO.prototype.addAttribute = function(attribute, value) {
-    if (this.booleanValues.length && this.booleanValues.indexOf(attribute) !== -1 && value != null) { // transform integer 0,1 into boolean
-      value = !!value
-    }
-
-    this[attribute] = value;
-  }
-
   DAO.prototype.setValidators = function(attribute, validators) {
   DAO.prototype.setValidators = function(attribute, validators) {
     this.validators[attribute] = validators
     this.validators[attribute] = validators
   }
   }