Added setter for packet generator/consumer bernoulli probability.
Converted buffer creation to initialisation.
Converted scheduler from create to init.
Converted arbiter from create to init.
Convert spinn_router from create to init.
Converted packet functions from create to init.
Quick initial stab at a full system.
Make the simulation do something (not neccessarily correct).
Added reporting of rejected packet generations.
Quick test of offered/accepted load monitoring.