Unit test "CHtmlTest" has been updated exposing issue #2423
"CHtml::button()" has been updated to not enforce "value" attribute for the image buttons.
Issue #2423 has been added to CHANGELOG.
Russian guide minor enhancements.
Demo blog, User model enhancements:

1. Added EOL at the end of file.
2. Added @throws tag to the User::generateSalt() method.
3. Removed invalid and unnecessary Yii::t() translation call.
4. Fixes #2375. `str_pad` replaced with `sprintf`.
Fixes #2426: CDbCriteria::__wakeup() used to issue an error in case SQL containing fields were arrays and criteria parameters were specified.
Merge pull request #2425 from klimov-paul/2423-image-button-value

Fixed #2423: CHtml::button() enforces "value" attribute for the image buttons
Merge branch '2426-CDbCriteria-wakeup' of https://github.com/resurtm/yii into resurtm-2426-CDbCriteria-wakeup

Conflicts:
	CHANGELOG
Changes in CClientScript::registerScriptFile() and CClientScript::registerScript() and new Active Record meta data management have been added to UPGRADE.
Merge pull request #2447 from klimov-paul/upgrade-missings-for-1.1.14

Some missing upgrade instructions for 1.1.14
Typo in UPGRADE file