yiisoft/yii2 — pull request #3329 by chanhong (2014-05-02 16:12:01+00:00)
Title: with these changes, YIISOFT which hold vendor folder can easily redirect ...

When there is a need to run Yii on a network share which could be slower then Yii run from a local hard drive so these changes will enable the redirect of Yii core into location where it will load faster thus will make Yii site run faster on a network share.