Added stub documentation for plugin architecture
Added stub documentation for plugin architecture

MadBomber/CLAVIN,OpenWhere/CLAVIN,Adam-Carstensen/CLAVIN,Berico-Technologies/CLAVIN,OpenWhere/CLAVIN,sgavmp/CLAVIN,Adam-Carstensen/CLAVIN,sgavmp/CLAVIN,MadBomber/CLAVIN,Berico-Technologies/CLAVIN