Visual Studio 2013 Update 4 RC is now available to download. This release has lots of small features and fixes for ASP.NET and web platform, Team Foundation Server, Visual C++, JavaScript Editor, Testing Tools, and some other areas. Specifically for updates to the web development tools checkout this new features announcement on .NET web development and tools blog.
The release notes have the complete list of features and fixes included in this release.
Read more: MS Download
Read more: The Visual Studio Blog