Update 08-Customization.md

Correct 'frontent' to 'frontend'.
Merge pull request #389 from pfaocle/patch-1

Update 08-Customization.md
tiny version bump
updated docs for Yii2 module
=auto-updated documentation
Update Configuration.php

Dist fix. 
Otherwise parser doesn't find $suite.suite.dist.yml
Merge pull request #398 from Redjik/master

Dist fix
Update WebInterface.php

Update according to @Tro95 example
Merge branch 'master' of https://github.com/Codeception/Codeception into vreasy