Add structure-extensions.md to translate into Russian
structure-extensions.md is translated to Russian
fixes for translation of file 'structure-extensions.md' to Russian
fixes for translation of file 'structure-extensions.md' to Russian
Merge branch 'master' of https://github.com/maxmirazh33/yii2
Merge branch 'master' of git://github.com/yiisoft/yii2
Fix PHPDoc
Unused InvalidConfigException
Merge pull request #4807 from mrarthur/patch-6

Unused InvalidConfigException
Merge pull request #4808 from nenad-zivkovic/master

fixes typos in start-databases.md
Merge pull request #4806 from mrarthur/patch-5

Fix PHPDoc
Merge pull request #4804 from maxmirazh33/master

structure-extensions.md translated to Russian[skip-ci]
Used a single database and a single CLI entry point for all test types. Added faker to basic app dev requirements.
Fixes #4724: fixed example in "Creating your own rule classes"
Merge pull request #4809 from nenad-zivkovic/master

[ci skip] Adds start-gii-crud-preview image to the gii guide