Always use cpu count from config
Always use cpu count from config

Apparently cpu_count() is not always reliable, and I think we can
trust users to specify an existant number of cores.
http://stackoverflow.com/questions/31344582/python-multiprocessing-cpu-count-returns-1-on-4-core-nvidia-jetson-tk1

energyPATHWAYS/energyPATHWAYS