Fixes: CHtml::activeTelField() used to display time input, not tel.
Fixes: CActiveForm::telField() used to display time input, not tel.
Fixes #2087: CLocale: getLocaleDisplayName() was only returning the language display name, not the full locale display name.
Enh #2135: Yii::t() messages in subfolders

Manual merge of PR #2209 of @firsyura
CHANGELOG adjustment for #2209
Fixes #2121: CMssqlSchema::resetSequence() incorrectly resets sequence.
Fixes #2217: CHtml::radioButtonList() now supports $empty option.
Merge pull request #2218 from resurtm/fixes-2217

Fixes #2217: CHtml::radioButtonList() now supports $empty option.
Merge pull request #2214 from resurtm/2121-MSSQL-CDbFixtureManager

Fixes #2121: CMssqlSchema::resetSequence() incorrectly resets sequence.
Add extension.create.txt Brazilian Portuguese translation to Yii Definitive Guide.
Add extension.integration.txt Brazilian Portuguese translation to Yii Definitive Guide.
Add new translator name and change copyright period to 2008-2013 in Brazilian Portuguese index of Yii Definitive Guide.
Correct one section title in Brazilian Portuguese table of contents of Yii Definitive Guide.
Add upgrade.txt Brazilian Portuguese translation to Yii Definitive Guide.
Add test.overview.txt Brazilian Portuguese translation to Yii Definitive Guide.
Add test.fixture.txt Brazilian Portuguese translation to Yii Definitive Guide.
Add test.unit.txt Brazilian Portuguese translation to Yii Definitive Guide.
Add test.functional.txt Brazilian Portuguese translation to Yii Definitive Guide.
Update CJuiButton.php

Fix.
Merge pull request #2226 from marsuboss/patch-1

CJuiButton.php doc update
[ci skip]