add creation process and creation event and rename outgoing_value_flows to value_flow_going_forward
add creation process and creation event
and rename outgoing_value_flows to value_flow_going_forward

valnet/valuenetwork,django-rea/nrp,FreedomCoop/valuenetwork,django-rea/nrp,simontegg/valuenetwork,thierrymarianne/valuenetwork,thierrymarianne/valuenetwork,thierrymarianne/valuenetwork,valnet/valuenetwork,thierrymarianne/valuenetwork,simontegg/valuenetwork,simontegg/valuenetwork,django-rea/nrp,valnet/valuenetwork,django-rea/nrp,valnet/valuenetwork,FreedomCoop/valuenetwork,simontegg/valuenetwork,FreedomCoop/valuenetwork,FreedomCoop/valuenetwork