Merge pull request #2 from jeoy/master

添加注释
Merge pull request #3 from jeoy/master

最新代码
Update page.php
delete gloable_variable.txt

joey renewed class key, which uses memcache and makes the file useless.
session structure v1
session structure v1.1
requirement v1
sync function for ys
Merge pull request #1 from yeahu/master

试图同步原作者