[LAD] LV2 format stuff

[Krzysztof Foltman]

Lars Luthman wrote:
> The only thing needed to distinguish between small "icon" GUIs
> and large "editor" GUIs would be some sort of annotation in the RDF data
> (that hosts would be free to ignore if they wanted to).
>   
Yes, that would do the job.

I thought of cairo surface plus a sort of event mechanism too, but that 
would be a bit excessive, too much work for too little gain.

Krzysztof