Fix string concatenation.
Merge pull request #685 from jorbor/master

Fix string concatenation in RegisterRestPath()
Added UrlReferrer property to IHttpRequest
Merge pull request #686 from jokecamp/master

Issue #658: Add UrlReferrer property to ServiceHost.IHttpRequest
A few unit tests for Razor testing access to Html helper and accessing ViewBag from Layout
Remove unused using statements
Merge pull request #688 from dsimunic/RazorTests

A few unit tests for Razor