fixes #2887

* query-filter:
  added CHANGELOG lines
  added tests for redis
  added proper tests for elasticsearch
  removed unnecessary code duplication
  adjusted tests
  typo
  renamed Query::filter() to Query::filterWhere()
  reverted elasticsearch rename of filter
  Adjusted search model code generated by Gii CRUD generator
  Added support for arbitrary number of parameters for NOT, AND, OR in filter methods of Query
  Gii CRUD generator now uses new addFilter method
  Query::filter() adjustments
  fixes #2002
  Added tests for Query::filter()

Conflicts:
	framework/db/QueryTrait.php

fixes #2957

add @method hasOne|hasMany declaration in yii\db\ActiveRecord. 

fix for https://github.com/yiisoft/yii2/pull/2958

Add Vietnamese into messages.

#2936: New favicon for applications

Fixes #2932: Added `yii\web\ViewAction` that allow you to render views based on GET parameter

See this for more details: https://github.com/yiisoft/yii/pull/3300

Tiny Change - Typo

Second Example should start with ProgressBar::begin not ProgressBar::widget

use alias format for table names

Refactored ActiveRecord::find() so that find(null) will also return an ActiveRecord instance instead of ActiveQuery.