update version of NISP v1.3.1

NISP/NISP/Cluster.py

@@ -1,4 +1,4 @@
-
+from sys import exit
 
 def get_cluster(task):
 	motif, motif_details, element, local_optimiser, e_coh, no_atoms, no_of_tasks, counter = task

NISP/NISP/Interpolation_Connection.py

@@ -1,3 +1,4 @@
+from sys import exit
 # This section of he code is responsible for creating the connections between clusters
 
 # This method will create all the conenctions between clusters.

NISP/NISP/Manual_Mode.py

@@ -1,5 +1,6 @@
 import os
 from shutil import rmtree
+from sys import exit
 
 from ase.io import write
 from ase.cluster.icosahedron import Icosahedron

NISP/NISP/Run_Interpolation_Scheme.py

@@ -29,6 +29,7 @@
 print('Loading os, timing, and multiprocessing modules')
 import os, time
 import multiprocessing as mp
+from sys import exit
 print('Beginning Interpolation Program')
 
 def check_value(value,plot_information,default):

NISP/NISP/motif_methods.py

@@ -1,4 +1,4 @@
-
+from sys import exit
 
 def no_of_atoms_to_make_ico(noshells):
 	if noshells < 1: