praekelt/vumi — pull request #550 by smn (2013-05-24 13:19:13+00:00)
Title: Production Airtel USSD fixes

1. Use the SessionID, we're getting it consistently even though the docs say we won't.
2. The input parameter provides the USSD code on the first connection, and full input for subsequent connections, it isn't appended like Safaricom does.