Add spaceless widget.
PHPDoc Markdown newlines before code blocks added.
Merge pull request #560 from resurtm/spaceless-widget

Add spaceless widget.
Console application has to exit with exitCode

fixes #562
Change validators from 'length' to 'string'
Merge pull request #564 from FrediL/master

Change validators from 'length' to 'string'
Better PHPDoc in Model::addError().
Merge branch 'master' of github.com:yiisoft/yii2 into model-add-error