Add setup.py to allow local pip installs of tfw

lib/envvars/__init__.py

@@ -0,0 +1,12 @@
+# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
+# All Rights Reserved. See LICENSE file for details.
+
+from collections import namedtuple
+from os import environ
+
+
+def prefixed_envvars_to_namedtuple(prefix: str, tuple_name: str):
+    envvars = {envvar.replace(prefix, '', 1): environ.get(envvar)
+               for envvar in environ.keys()
+               if envvar.startswith(prefix)}
+    return namedtuple(tuple_name, envvars)(**envvars)