Add Chinese Translation Team
Merge remote-tracking branch 'chinesization/master'
Update README [skip ci]
transalating intro-upgrade-from-v1, left with asset, query builder, form, etc.
更新文档
Fix translate
updated CHANGELOG.md
phpDoc micro-fix
Added ability to `yii\bootstrap\Tabs` to encode each `Tabs::items['label']` separately
Merge pull request #4023 from marsuboss/fix-translate

Fix translate
added note about resubmitting forms

thanks to @Ragazzo
fixes #3799
fixed
Translated intro-upgrade-from-v1 [skip ci]
Added info about local `encode` param which overrides global
Added support for transaction isolation levels

fixes #3220
Fix CHANGELOG.md
Merge pull request #4024 from umneeq/yii-bootstrap-tabs-enh

Added ability to `yii\bootstrap\Tabs` to encode each `Tabs::items['label']` separately
Fixes #4027: added Turkish messages
Fixes #4005: added phpdoc to search model Gii template
guide WIP [skip ci]