Update sites.txt, add StereoSanctionMultiFX

[lukasz1podgorski]

Add your repo!

To get it merged quickly, please check:

• You modified sites.txt, not README.md (which is auto-generated each night)
• You provided the full url, ala https://github.com/myname/myrepo with no trailing slash at the end of the url
• The description is short n' sweet
• There's no period on the end of the description
• You didn't add extra newlines

You can add a gitlab or other url, but only github repositories currently show stars and licenses.

[sudara]

Happy to add this, but does it have a license?

[lukasz1podgorski]

Happy to add this, but does it have a license?

@sudara There is no license, it was my Master thesis. Please let me know if the license is mandatory to include the plugin in the list and I will add it. Thanks!