The preferred way to install this extension is through composer.
Either run
php composer.phar require --prefer-dist webvimark/module-feedback "*"
or add
"webvimark/module-feedback": "*"
to the require section of your composer.json file.
In your config/web.php
'modules'=>[
...
'feedback' => [
'class' => 'webvimark\modules\feedback\FeedbackModule',
],
...
],