update Directory Reference

Files
file	api.php
	The class core\update\api is defined here.
file	checker.php
	Defines classes used for updates.
file	checker_exception.php
	Defines classes used for updates.
file	code_manager.php
	Provides core\update\code_manager class.
file	info.php
	Defines classes used for updates.
file	remote_info.php
	Provides core\update\remote_info class.
file	validator.php
	Provides validation class to check the plugin ZIP contents.