Fixes #2054: Added support for using custom application configuration with the console command runner

The scripts in asset bundles are now registered in `View` at the end of `endBody()`. It was done in `endPage()` previously

Revert "Added `yii\base\Module::getParam($name, $defaultValue = null)`  to conveniently work with application parameters"

This reverts commit 3b95aa9c.

Added `yii\base\Module::getParam($name, $defaultValue = null)`  to conveniently work with application parameters

Fixes #1812: Hide potential warning message due to race condition occurring to `Session::regenerateID()` call

Fixes #2298: Fixed the bug that Gii controller generator did not allow digit in the controller ID (qiangxue)

Fixes #2303: Fixed the bug that `yii\base\Theme::pathMap` did not support dynamic update with path aliases

- refactored elasticsearch AR to make type and index available in
  instantiate(), issue #1313

fixes #2281

Fixes #1412: `FileValidator` still triggers `uploadRequired` error in some case when `skipOnEmpty` is true and no upload is provided

Improved `QueryBuilder::buildLimit()` to support big numbers

Revert "Fixes #1856: The default CSS class for hint generated by `ActiveField` is changed to `help-block`"

This reverts commit 7ae4695d.

Fixes #2212: `yii\gridview\DataColumn` generates incorrect labels when used with nosql DB and there is no data

Fixes #706: Added `yii\widgets\Pjax` and enhanced `GridView` to work with `Pjax` to support AJAX-update

which resulted in endless loop

http://www.yiiframework.com/forum/index.php/topic/50982-cfilehelper-bug-security-flaw/

Added `yii\web\Request::get($name = null, $defaultValue = null)` and `yii\web\Request::post($name = null, $defaultValue = null)`