added codeception tests to frontend
modified buttons attributes to skip sf-crawler bug
added codeception to backend
added button attributes to skip sf-crawler bug
added codeception tests to common
added codeception main yaml
added codeception tests to console
added index tests files to application
added guide notes
newlines fixed, code-guy deleted
improved dependencies, guide
removed ordered list
formatting improved
correct lists fixed
Merge branch 'yii2_advanced_app_codeception' of github.com:Ragazzo/yii2 into Ragazzo-yii2_advanced_app_codeception

Conflicts:
	apps/advanced/README.md