Add Chinese Translation Team
Merge remote-tracking branch 'chinesization/master'
Fixes #3535: Syntax changes

- Removed `form_begin`, `form_end`
- Added `use()` and `ViewRenderer::uses` that are importing classes and namespaces
- Added widget dynamic functions `*_begin`, `*_end`, `*_widget`, `widget_end`
- Added more tests
Update a tip and an example

- add a tip that rbac.php is needed to create manually when using PhpManager.
- update that RbacController example needs to import Yii namespace.
Merge pull request #3983 from sitawit/patch-1

Update a tip and an example
Changed descriptive extension name to ID
Merge pull request #3978 from yiisoft/twig-syntax-changes

Fixes #3535: Syntax changes
added widget Breadcrumbs unit tests.
Fixes #3956: Debug toolbar was affecting flash message removal
Fixes #3979: Alert widget in advanced app is now able to display multiple flash messages of the same type
add translate
Merge pull request #3985 from githubjeka/translate-2

add guide-ru/rest-quick-start.md
Fixes #3793: Changed inline autocomplete hints style to get more IDEs support
doc improvement.
doc improvement [skip ci]
Update ActiveForm.php

Incorrect character for generating docs. See http://www.yiiframework.com/doc-2.0/yii-bootstrap-activeform.html
Merge pull request #3991 from ychongsaytc/patch-2

Update ActiveForm.php
added more unit tests to widgets\Breadcrumbs and 100% coverage.
Merge pull request #3995 from njasm/master

Added more unit tests to widgets\Breadcrumbs and increased coverage to 100%
Fixes #3996: Traversing `Yii::$app->session` may cause a PHP error