tests improved, verify added
beforeSubmit function after global validation all fields forms
"Using 3rd-Party Libraries" guide added
"Using 3rd-Party Libraries" guide updated
Missing "md" extension added for "Using 3rd-Party Libraries" guide part
Merge branch 'master' of github.com:yiisoft/yii2 into 1837-3rd-party-doc
added possibility to save messages to be translated
code format fixed
Added fixture classes.
removed trash code.
forgotten rows
algorithm of data insertion approved
Added FixtureTrait.
format fixed, substr changed to mb_substr, database-related settings added
Fixes #2016: removed ability to declare scopes in ActiveRecord leaving it to ActiveQuery. Changed documentation accordingly.
Added note about scopes to upgrade guide
Fixed test breaks
Fixed scope method signatures
Fixed tests for elasticsearch, mongo, redis
finished fixture feature.