* Use mixin class for ViewController management

core/mod_mixins.js

@@ -0,0 +1,30 @@
+/* jslint node: true */
+'use strict';
+
+var assert				= require('assert');
+
+//
+//	A simple mixin for View Controller management
+//
+var ViewControllerManagement = function() {
+	this.initViewControllers = function() {
+		this.viewControllers = {};
+	};
+
+	this.detachViewControllers = function() {
+		var self = this;
+		Object.keys(this.viewControllers).forEach(function vc(name) {
+			self.viewControllers[name].detachClientEvents();
+		});
+	};
+
+	this.addViewController = function(name, vc) {
+		assert(this.viewControllers, 		'initViewControllers() has not been called!');
+		assert(!this.viewControllers[name], 'ViewController by the name of \'' + name + '\' already exists!');
+		
+		this.viewControllers[name] = vc;
+		return vc;
+	};
+};
+
+exports.ViewControllerManagement	= ViewControllerManagement;