修正composer安装，完善console模式

mode/console/App.php

@@ -0,0 +1,43 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006-2015 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: yunwuxin <448901948@qq.com>
+// +----------------------------------------------------------------------
+
+namespace think;
+
+
+use think\Console;
+
+class App
+{
+    /**
+     * 执行应用程序
+     * @access public
+     * @return void
+     */
+    public static function run()
+    {
+        // 实例化console
+        $console = new Console('Think Console', '0.1');
+        // 读取指令集
+        if (is_file(APP_PATH . 'command' . EXT)) {
+            $commands = include APP_PATH . 'command' . EXT;
+            if (is_array($commands)) {
+                foreach ($commands as $command) {
+                    if (class_exists($command) && is_subclass_of($command, "\\think\\console\\command\\Command")) {
+                        // 注册指令
+                        $console->add(new $command());
+                    }
+                }
+            }
+        }
+        // 运行
+        $console->run();
+    }
+}