support model instead of daoFactory

lib/dao-factory.js

@@ -379,6 +379,11 @@ module.exports = (function() {
     }
 
     if (typeof include === 'object') {
+      if (include.hasOwnProperty('model')) {
+        include.daoFactory = include.model
+        delete include.model
+      }
+
       if (include.hasOwnProperty('daoFactory') && (include.hasOwnProperty('as'))) {
         var usesAlias   = (include.as !== include.daoFactory.tableName)
           , association = (usesAlias ? this.getAssociationByAlias(include.as) : this.getAssociation(include.daoFactory))