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
strict string comparison is always better
Merge pull request #3249 from RusAlex/strict_string_comparison2

strict string comparison is always better
Typo fix
Typo
Typo
Merge pull request #3257 from munawer-t/master

Typo fix
run build against hhvm but allow them to fail
Misspelled placeholder for {min} value
Merge pull request #3263 from Deele/patch-2

Misspelled placeholder for {min} value
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