Fixes #2435: `yii\db\IntegrityException` is now thrown on database integrity errors instead of general `yii\db\Exception`

`BaseActiveRecord::findAll()` comment fix

[NL] brought translations up to date

Fix for comparing numeric attributes in JavaScript

Conflicts:
	framework/assets/yii.validation.js

HHVM compatibility Fixes for Yii 2 Console Application 

Should have started this before; important to maintain consistency.

[ci skip]

Catalan translation

No major changes. Looks good!

Update concept-behaviors.md

fixed spelling

Fixed document for multisort in BaseArrayHelper

Fixed

Lithuanian translation

[ci skip] Update Generator.php