Enabled comments in config files

DESTINATIONS.example

@@ -1,4 +1,5 @@
 haumea sk1480@haumea1:/data/sk1480/IOW_ESM
 phy-2 karsten@phy-2:/silod7/karsten/IOW_ESM
 hlrnb mvkkarst@blogin:/scratch/usr/mvkkarst/IOW_ESM
-hlrng mvkkarst@glogin:/scratch/usr/mvkkarst/IOW_ESM
+hlrng mvkkarst@glogin:/scratch/usr/mvkkarst/IOW_ESM
+# you can add comments if the line starts with '#'

gui/iow_esm_globals.py

@@ -35,10 +35,17 @@ def read_iow_esm_configuration(file_name):
     config = {}
     with open(file_name, "r") as f:
         for line in f:
+            
+            # skip comments
+            if line[0] == "#":
+                continue
+            
+            # separate line into keyword and value
             try:
                 (key, val) = line.split()
                 config[key] = val
             except:
+                # ignore empty lines
                 pass
             
     return config