Upgrade Mail to new-style class, on Python 2.x.

Ken Harris · Ken Harris · commit 723563e38958 · 2015-06-09T13:31:27.000-07:00
May help with issue #103.
diff --git a/sendgrid/message.py b/sendgrid/message.py
@@ -8,7 +8,7 @@
 from smtpapi import SMTPAPIHeader
 
 
-class Mail():
+class Mail(object):
 
     """SendGrid Message."""
 
