Would have been great to have seen this last week when I was doing just this 😉
I'd be very interested to hear your thoughts on why Microsoft still haven't provided a TFS connector for the SSDT VS 2015 Shell - you have to have the full version of VS 2015 to get this. I've seen various suggestions about installing VS 2015 Community and messing about with DLLs but really I can't understand why Microsoft don't just pull their fingers out and do it properly!