Actually fixing Python 3 support; verified both IMAP and POP3. Fixes #13 (seriously this time).

django_mailbox/transports/base.py

@@ -0,0 +1,19 @@
+import email
+
+import six
+
+# Do *not* remove this, we need to use this in subclasses of EmailTransport
+if six.PY3:
+    from email.errors import MessageParseError
+else:
+    from email.Errors import MessageParseError
+
+
+class EmailTransport(object):
+    def get_email_from_bytes(self, contents):
+        if six.PY3:
+            message = email.message_from_bytes(contents)
+        else:
+            message = email.message_from_string(contents)
+
+        return message