Add support for 'Test With > Edit & Continue'

[jcansdale]

set COMPLUS_FORCEENC=1

See: https://gitter.im/Microsoft/extendvs?at=58f782f4f22385553d5770e0 http://stackoverflow.com/questions/30632427/how-to-edit-and-continue-in-asp-net-mvc-6 https://twitter.com/jcansdale/status/854838802338263040