sequelize import can now accept a function as the definition

lib/sequelize.js

@@ -216,7 +216,7 @@ module.exports = (function() {
 
 
   Sequelize.prototype.import = function(path) {
   Sequelize.prototype.import = function(path) {
     if (!this.importCache[path]) {
     if (!this.importCache[path]) {
-      var defineCall = require(path)
+      var defineCall = (arguments.length > 1 ? arguments[1] : require(path))
       this.importCache[path] = defineCall(this, DataTypes)
       this.importCache[path] = defineCall(this, DataTypes)
     }
     }