changed mail subject encoding to avoid errors

atomstrom.py

@@ -145,7 +145,7 @@ def send_mail(sender, receiver, subject, body):
     mail = MIMEText(body)
     mail['From'] = sender
     mail['To'] = receiver
-    mail['Subject'] = subject
+    mail['Subject'] = subject.decode('latin-1')
     mailserver = smtplib.SMTP('localhost')
     mailserver.sendmail(sender, [receiver], mail.as_string())
     mailserver.quit()