Dev 1.1 Second Pull Request

you can refactor this po
```php
if ($this->username != $username) {
    throw new ValidationException(notify('Restrict Deletion:User do not own this Comment',"error"));
}

$db = DB::conn();
$db->query("DELETE FROM comment WHERE id = ? AND username = ?", 
array($this->id, $this->username));
```

Validate first before doing the process :bow: