* add extension logic for footer.admin.html.php.
 * ignore www/data.
 * change code format.
Merge branch 'master' of https://github.com/xirang/chanzhieps
Merge branch 'master' of https://github.com/xirang/chanzhieps
Merge branch 'master' of https://github.com/xirang/chanzhieps
Merge branch 'master' of https://github.com/xirang/chanzhieps
Merge branch 'master' of https://github.com/xirang/chanzhieps