This project has been integrated into Yii2 as part of the yii2-bootstrap extension. You should not used it anymore.
For now we only keep it up to provide some extra documentation examples. They may not be fully compatible with the yii2-bootstrap version, though.
http://codemix.github.io/yii2-bs3activeform/
The source code of the docs is included as module. You can configure it locally with:
'modules' => [
'bs3demo' => [
'class' => 'codemix\bs3\demo\Module',
],
],