put back most folders

util/util.py

@@ -0,0 +1,7 @@
+import re 
+
+def sort_alphanumeric(data):
+    """ Sorts a list alphanumerically """
+    convert = lambda text: int(text) if text.isdigit() else text.lower()
+    alphanum_key = lambda key: [convert(c) for c in re.split('([0.9]+)', key)]
+    return(sorted(data, key=alphanum_key))