CUBRID Database 9.0 Support.
Ref: converted spaces to tabs according to Yii coding conventions.
Ref: converted spaces to tabs.
Merge branch 'cubrid-database-support' of https://github.com/kadishmal/yii into kadishmal-cubrid-database-support

* 'cubrid-database-support' of https://github.com/kadishmal/yii:
  Ref: converted spaces to tabs.
  Ref: converted spaces to tabs according to Yii coding conventions.
  CUBRID Database 9.0 Support.
CUBRID copyright, version and indentation fixes

adjustments to PR #1893
Code style

adjustments to PR #1893
Allow sql files diff & preview in gii
Backport Request::getPreferredLanguage() from yii2
fixed issue with CBreadcrumbs::homelink and activeLinkTemplate

fixes #3179
checkBoxList and radioButtonList to take into account closeSingleTags parameter for <br> tag

Changed checkBoxList and radioButtonList methods to generate <br/> or
<br> separator tags depending on closeSingleTags setting.
Added changelog for pull request #3277
Merge pull request #3277 from hwmaier/master

checkBoxList and radioButtonList to take into account closeSingleTags pa...
updated [SK] translation
Merge pull request #3285 from lubosdz/master

updated [SK] translation
3288 - Check if PHPUnit_Runner_Version exists before requiring.
Updated changelog.
Adhere to code style.
Merge pull request #3289 from hjellek/3288-Check-PHPUnit_Runner_Version-before-requiring

3288 - Check if PHPUnit_Runner_Version exists before requiring
Update yii.php
Merge pull request #3292 from winiarekk/patch-1

Update yii.php