Commented Task: Update Microsoft.Web.Helpers to use RazorGenerator [1477]

Currently the cshtml files in this project are compiled to cs files using the RazorGenerator vsix. Changing this to use the msbuild task would remove this extra requirement.
Comments: The second changeset number (9198909c3fe4b54fa2fd56f6aaf2127dded2f313) is related to this one but is meant for #1280.