Use 2 spaces after top level definitions

Brings code closer to flake8 compliance by passing rule:

E305 expected 2 blank lines after class or function definition

http://pycodestyle.pycqa.org/en/latest/intro.html#error-codes
diff --git a/updatezinfo.py b/updatezinfo.py
index e767366..f99eece 100644
--- a/updatezinfo.py
+++ b/updatezinfo.py
@@ -50,5 +50,6 @@
             metadata=metadata)
     print("Done.")
 
+
 if __name__ == "__main__":
     main()