VS 2015. It's in Release Candidate mode now. You can read about it here
http://docs.asp.net/en/latest/>What version of VS is ASP.NET 5? And if there is no web.config, what is the name of the JSON-type configuration file? I would be curious to see what it looks like.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer