Fix issue when generating email (unicode decoding)

main.py

@@ -124,7 +124,7 @@ def password_lost():
                 "From: %s" % EMAIL,
                 "To: %s" % user['email'],
                 "Subject: [Cavote] Password lost",
-                "Date: %s" % time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime()),
+                "Date: %s" % time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime()).decode('utf-8'),
                 "X-Mailer: %s" % VERSION,
                 "",
                 "You have lost your password.",
@@ -254,7 +254,7 @@ def admin_user_add():
                             "From: %s" % EMAIL,
                             "To: %s" % user['email'],
                             "Subject: [Cavote] Welcome",
-                            "Date: %s" % time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime()),
+                            "Date: %s" % time.strftime("%a, %d %b %Y %H:%M:%S +0000", time.gmtime()).decode('utf-8'),
                             "X-Mailer: %s" % VERSION,
                             "",
                             "Hi %s!" % user['name'],