[PD] iemguts and propertybang

[patrick]

hi IOhannes,
> in this case it would be better to just add iemguts to pdx.
we had a discussion on #dataflow and you told me that iemguts is not 
finished or stable enough to be included in pd-extended. since mtl use 
only propertybang maybe we could just take this code and have it include 
in pd-extended.

but yes, if iemguts is ready to be include in pd-extended let's do this.

pat