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
should instead use a bound property for the `src` attribute.  we've been fairly consistent about this in the other tag helpers.  the main wrinkle is the need to maintain the original attribute name (and its casing) i.e. `output.CopyHtmlAttribute(nameof(Src), context);`.