Add docblock indent fixer

Ensure that docblocks for class methods and attributes are indented if present
EDIT: Ensure that any docblock uses the same indentation as the documented subject, regardless the type
Here is how you could fix the indentation inside the codeblock without needing to know what the newlines are (and without assuming the are the same):

```php
private function fixDocBlock($content, $indent)
{
    return preg_replace('/^[ \t]*/m', $indent.' ', $content);
}
```