Sphinx unit tests fixed.
Remove extra var
Docs on autoloading and helpers
Provided example setting YII_DEBUG to false
Merge pull request #1346 from slavcodev/clean-var-dumper

Remove extra var
Use backquotes to quote column and table names for sqlite (related with #1318)
Added Application::getMail().
Fixed test break using file transport.
refactored EmailTarget with the new mailer interfaces.
Refactored MessageInterface::send().
doc fix.
Merge branch 'master' of github.com:yiisoft/yii2 into mongo
Mongo query "IN" condition shortcut syntax added.
Mongo Active Record created as draft.