added specification files for seeds/masks , cleaned up create_fsl_model.py
added specification files for seeds/masks , cleaned up create_fsl_model.py

roijo/C-PAC_complexitytools,roijo/C-PAC_complexitytools,roijo/C-PAC_complexitytools,danlurie/C-PAC,roijo/C-PAC_complexitytools,sgiavasis/C-PAC,sgiavasis/C-PAC,danlurie/C-PAC,sgiavasis/C-PAC,danlurie/C-PAC,sgiavasis/C-PAC,danlurie/C-PAC