modify request类
	new file:   framework/core/dispatcher.php

	new file:   framework/core/dispatcher.php
Merge branch 'master' of https://github.com/firezihai/zBase

Conflicts:
	framework/kernel.php

	modified:   framework/core/request.php
	new file:   framework/core/response.php
	modified:   framework/kernel.php
	new file:   framework/model/db.php
	new file:   framework/model/driver/mysql.php
	new file:   framework/model/model.php