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
don't create a new options object with such a narrow granularity.  this setting should be part of a new top-level `MVCTagHelperOptions` class. could also hang off `MVCOptions` (or a new `ScriptTagOptions` class that can be reached from `MVCOptions`) though TagHelpers aren't always enabled when MVC is used.