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Merge pull request #4102 from yii2-chinesization/master

Chinese Translation for this week
Merge pull request #4089 from klimov-paul/87-security-component-3

Fix #87: security helper converted into component and improved
Fixes #4072: `\yii\rbac\PhpManager` adjustments

- Data is now stored in three separate files for items, assignments and rules. File format is simpler.
- Removed `authFile`. Added `itemsFile`, `assignmentsFile` and `rulesFile`.
- `createdAt` and `updatedAt` are now properly filled with corresponding file modification time.
- `save()` and `load()` are now protected instead of public.
- Added unit test for saving and loading data.
Merge branch 'master' into rbac-phpmanager-adjusment

Conflicts:
	framework/UPGRADE.md
Update BaseMessage.php

See https://github.com/yiisoft/yii2/commit/0ff0f9d32eb71cc13b7c6eea45f85d115f98a633

https://github.com/yiisoft/yii2/issues/4071
Merge pull request #4107 from SDKiller/patch-2

Update BaseMessage.php
Fixes #4103
fix links and format [skip ci]
fix wrong file name [skip ci]
Fixed a call of function "generateRandomKey()" in app\base\Security
Merge pull request #4108 from fps01/master

Fixed a call of function "generateRandomKey()" in app\base\Security
Merge pull request #4092 from dizews/afterUpdate_event_ench

changedAttributes of AfterSaveEvent contain an old values
cleanup after #4092

fixes #4086
Adjusted naming
Result check at `Security::generateRandomKey()` added
made mcrypt a framework requirement
Update requirements.php
Merge pull request #4104 from yiisoft/rbac-phpmanager-adjusment

\yii\rbac\PhpManager adjustments
Advanced app `User` model code style fixes