minor refactoring

lib/sequelize/sequelize.js

-var Utils           = require("./utils")
-  , ModelDefinition = require("./model-definition")
-  , DataTypes       = require('./data-types')
+var Utils            = require("./utils")
+  , ModelDefinition  = require("./model-definition")
+  , DataTypes        = require('./data-types')
+  , ModelManager     = require("./model-manager")
+  , ConnectorManager = require('./connector-manager')
 
 
 var Sequelize = module.exports = function(database, username, password, options) {
 var Sequelize = module.exports = function(database, username, password, options) {
   options = options || {}
   options = options || {}
@@ -16,8 +18,8 @@ var Sequelize = module.exports = function(database, username, password, options)
     port    : options.port || 3306
     port    : options.port || 3306
   }
   }
   
   
-  this.modelManager = new (require("./model-manager"))(this)
-  this.connectorManager = new (require('./connector-manager'))(this.config)
+  this.modelManager = new ModelManager(this)
+  this.connectorManager = new ConnectorManager(this.config)
 }
 }
 Sequelize.Utils = Utils
 Sequelize.Utils = Utils