Merge branch 'master' of git://github.com/yiisoft/yii2
Fixes #4135
translate concept-aliases and autoloading [skip cii]
Added unit tests for Widget\ActiveField
fixes #1160
Correction semantic error

Correction semantic error on line 11.
Update QueryParamAuth.php

translate exception message
Merge pull request #4167 from raeef-refai/patch-1

Update QueryParamAuth.php
Guide-zh-CN intro-upgrade-from-v1.md proofread.
Merge pull request #6 from AbrahamGreyson/master

Guide-zh-CN intro-upgrade-from-v1.md proofread.
Guide-zh-cn/start-installation.md proofread.
Merge pull request #7 from AbrahamGreyson/master

Guide-zh-cn/start-installation.md proofread.
Merge pull request #4160 from brussens/master

Concept-service-locator - Russian translate
Fix bug in `yii\db\mysql\Schema`

Schema name was not used in ’SHOW CREATE TABLE’  query

Fixed bug where schema name was not used in ’SHOW CREATE TABLE’ query in `yii\db\mysql\Schema`

close #4162
improved description to deliver the original concepts better. [skip ci]
translated concept-autoloading.md [skip ci]
Switched to Codeception 2.0.* for application template tests
Merge pull request #4169 from yii2-chinesization/master

New Chinese translations are ready to serve
Missing semicolon
Merge pull request #4172 from mrarthur/patch-1

Missing semicolon