debugger tool WIP
Merge branch 'master' of https://github.com/yiisoft/yii2
Fixes #226: atomic operations and transaction support in AR.
Fixed typo in internals/ar.md.
fixed minor JS codestyle issues
AR atomic scenarios fixes.
AR atomic scenarios internals doc fix.
isOpAtomic → isOperationAtomic
Better argument name in the ActiveRecord::isOperationAtomic() method.
Merge pull request #253 from resurtm/ar-transactions-3

Fixes #226: atomic operations and transaction support in AR.
AR internals doc fix.
Fixes issue #257: removed the $view parameter from widget methods.
Removed unneeded code.
Fixed issue with getting Object component
Merge pull request #264 from cajoy/upstream

Fixed issue with getting Object component
Make multisort compatible with Sort

Test code
```php
$orders = $this->getSort()->getOrders();
ArrayHelper::multisort($data, array_keys($orders), array_values($orders));
```
Update phpDoc
partial response added, new code-style applied
code style fix
string helper fixed, mime-type reverted