restructuring and removing HEConfig

utils/he_ipv6/utils.py

@@ -0,0 +1,10 @@
+def xml2bool(xml_str):
+    if xml_str is None:
+        return(None)
+    xml_str = xml_str.lower()[0]
+    if xml_str in ('t', '1'):
+        return(True)
+    elif xml_str in ('f', '0'):
+        return(False)
+    else:
+        raise ValueError('Not a boolean value')