Aliases fix

This is possible fix for #5.
I've manualy added a second call of ```setAliases``` after Yii::createWebApplication.
This will recheck all aliases again and assign for missing values.
With this - the order of the given aliases will not be important.

After this PR, you can set back to the previous state your Yiinitializr templates
(like https://github.com/tonydspaniard/yiinitializr-basic/commit/fb86522ec832b5f8ffd666bb7c23f1c7d1d3f988)