Added tests of the CUploadedFile getExtensionName method
Reusing the CFileHelper getExtension method
Shifted CUploadedFile getExtensionName to use CFileHelper getExtension
views/ja/error403 updated
requirements/messages/ja/yii.php updated
updated changes.txt
quotation block marking added
Update Arabic translations
docs/guide/ja updated
Merge pull request #3433 from softark/2014-07-04-ja-update

2014 07 04 ja update
Merge pull request #3431 from softark/2014-07-04-doc-fix

quotation block marking added
Merge pull request #3432 from dralshehri/arabic_messages

Update Arabic translations
Fixes #3440: typo in docblock
Fix regression after #335: Gii module generator not creates empty subfolders
Merge pull request #3327 from intersvyaz/gii-patch-1

Fix regression after #335
CHANGELOG for #3327
Fixes #3465: Added ability to override system path
Revert "Fixes #3465: Added ability to override system path"

This reverts commit e08e47ce3ce503b5eb92f9f9bd14d36ac07e1ae9.

Fix is not complete. To be discussed in https://github.com/yiisoft/yii2/issues/4501
Fixes #2376: CHttpSession::regenerateID() now checks if session is started before regenerating session ID
Fix typo