Docs for linking stacktrace files to PHPStorm on Linux

[cebe]

are currently missing: https://github.com/yiisoft/yii2-debug/pull/162#issuecomment-263600124

Some useful resources:

• http://www.tuicool.com/articles/ANBBVj
• https://github.com/pinepain/PhpStormOpener
• https://youtrack.jetbrains.com/issue/IDEA-65879

[bashkarev]

example phpstorm

$config['modules']['debug'] = [
    'class' => 'yii\debug\Module',
    'traceLine' => '<a href="http://localhost:63342/api/file?file={file}&line={line}" onclick="var a=new XMLHttpRequest;a.open(\'GET\',this.href);a.send(null);return!1">{text}</a>'
]