Propsed ScriptTagHelper

- ScriptTagHelper added that changes src attribute to minified file name if it exists
- Changed the TagHelperSample.Web to support self-host (k web)
- Added Tag Helper projects to Mvc.NoFun.sln
- #1524
suggest reverting these changes unless / until we need something in either element.  will need a Tooling bug if VS persists doing useless things like this in later builds.