Warning for unsupported models

[nilsherzig]

Is your feature request related to a problem? Please describe. People run untested models and report their failures. It's great that people test different models, but this project isn't able to support more than a somewhat limited amount of small models. At least not until people can change more of the internal workings using the Webinterface.

Describe the solution you'd like Group tested / supported and other models or highlight them in some other way.