Adding Option parser util

Signed-off-by: Cristian Maureira-Fredes <cmaurei@aei.mpg.de>
Fixing submodule

Signed-off-by: Cristian Maureira-Fredes <cmaurei@aei.mpg.de>
Small fixes on mdot_medd.py

Signed-off-by: Cristian Maureira-Fredes <cmaurei@aei.mpg.de>