Unit test for "yii\console\controllers\MessageController" has been created.
Exception usage has been added to "yii\console\controllers\MessageController".
Action "template" has been added to "yii\console\controllers\MessageController".
Default action of "yii\console\controllers\MessageController" has been renamed to "generate".
Unit test for "yii\helpers\base\FileHelper" has been created.
Method "yii\helpers\base\FileHelper::removeDirectory()" has been added.
Method "yii\helpers\base\FileHelper::findFiles()" has been added.
"FileHelperTest" has been refactored.
"FileHelperTest" has been advanced.
Method "yii\helpers\base\FileHelper::mkdir()" has been added.
Test case "FileHelperTest::testGetMimeTypeByExtension()" has been added.
"self" replaced by "static" at "yii\helpers\base\FileHelper::mkdir()".
Doc comments at "yii\helpers\base\FileHelper::findFiles()" have been recomposed using markdown format.
"filter" callback option has been added to "yii\helpers\base\FileHelper::findFiles()".
"yii\helpers\StringHelper" usage has been added to "yii\helpers\base\FileHelper".
"StringHelper::basename()" has been replaced by plain "basename" at "FileHelper".
Merge pull request #523 from klimov-paul/file-helper

FileHelper port from 1.1.x
doc improvement.
FileHelper refactoring WIP
refactored FileHelper.