add documentation for REST models
add documentation for REST models

nicolaasmatthijs/Hilary,simong/Hilary,simong/Hilary,nicolaasmatthijs/Hilary,timdegroote/Hilary,stuartf/Hilary,jfederico/Hilary,ExC0d3/Hilary,Orodan/Hilary,mrvisser/Hilary,timdegroote/Hilary,jfederico/Hilary,Orodan/Hilary,mrvisser/Hilary,stuartf/Hilary,ExC0d3/Hilary