added an example for how to use Sequelize with multiple model files

examples/UsingMultipleModelFiles/Project.js

+exports.getProjectClass = function(Sequelize, sequelize) {
+  var Project = sequelize.define("Project", {
+    name: Sequelize.STRING,
+    description: Sequelize.TEXT
+  })
+  
+  /*
+    Here comes further Project logic
+  */
+  
+  return Project
+}
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examples/UsingMultipleModelFiles/Task.js

+exports.getTaskClass = function(Sequelize, sequelize) {
+  var Task = sequelize.define("Task", {
+    name: Sequelize.STRING,
+    deadline: Sequelize.DATE,
+    importance: Sequelize.INTEGER
+  })
+  
+  /*
+    Here comes further Task logic
+  */
+  
+  return Task
+}
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examples/UsingMultipleModelFiles/app.js

+var Sequelize = require(__dirname + "/../../src/Sequelize").Sequelize,
+    sequelize = new Sequelize("sequelize_test", "test", "test"),
+    Project   = require(__dirname + "/Project").getProjectClass(Sequelize, sequelize),
+    Task      = require(__dirname + "/Task").getTaskClass(Sequelize, sequelize)
+  
+Project.hasMany('tasks', Task)
+Task.belongsTo('project', Project)
+
+Sequelize.Helper.log(Project)
+Sequelize.Helper.log(Task)
+
+    
+sequelize.drop(function() {
+  sequelize.sync(function() {
+    new Project({
+      name: 'Sequelize',
+      description: 'A nice MySQL ORM for NodeJS'
+    }).save(function(project) {
+      var task1 = new Task({
+        name: 'Choose a nice MySQL connector',
+        deadline: new Date(),
+        importance: 10
+      })
+      var task2 = new Task({
+        name: 'Build the rest',
+        deadline: new Date(),
+        importance: 90
+      })
+      Sequelize.chainQueries([{save: task1}, {save: task2}], function() {
+        project.setTasks([task1, task2], function(tasks) {
+          Sequelize.Helper.log(project)
+          Sequelize.Helper.log(tasks)
+        })
+      })
+    })
+  })
+})
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