* add sites directory.
 * fix the error of DS.
Merge branch 'master' of git@github.com:xirang/xirangeps
 + add upgrade1.0.sql.
 * change version to 1.1.
 * adjust the code to init lang object.
 * adjust code format.
 + add home item.
 * set default version is 1.0.
 + add the feature of upgrade.