Fixes #1905: Update composer.json to use jQuery 2.0.*
Fixed yii2-dev package to use correct path for PSR-4
Used dirname instead of realpath to avoid extra FS operations
Added note about configuring theme do docs
Update yii.php

Fixed missing translation
Merge pull request #1936 from Theill11/patch-1

Fixed missing danish translation
fixes #1870: better fix that is message extractor friendly