translation into russian language docs/guide/start-gii.md
translate to russian language
Merge pull request #4661 from LAV45/translate-docs-to-ru

[skip ci] Translate docs/guide-ru/start-gii.md to russian language
Fixed typo in comments for generatePasswordHash
Merge pull request #4662 from hwabbott/master

Fixed typo in comments for generatePasswordHash
add structure-overview.md
Fixes #4659: adjusted nginx config in docs to serve 404 instead of "no input file specified" when accessing non-existing PHP file
Fixes #4637: fixed broken Twig method calls
Fixes #4597: `yii\composer\Installer::setPermission()` supports setting permission for both directories and files now (qiangxue)
add structure-entry-scripts.md
Grammar fix
Fixes #4553: Smarty enhancements
Merge pull request #4619 from yiisoft/smarty

Smarty improvements
Merge branch 'master' of github.com:yiisoft/yii2
Update db-active-record.md to correct a minor typo

changed problem to problems to correct a minor typo.
Merge pull request #4667 from jyaqub/patch-1

Update db-active-record.md to correct a minor typo
Add runner for all tests
Add namespaces to all tests
Use config variables instead constants. Cleanup redundant constants
Merge pull request #4671 from TriAnMan/test-runner

Provide aggregate test runner