I want to integrate my instance of VS 2015 RC with StyleCop in the way that I have StyleCop menu options [Run StyleCop, Run StyleCop (Rescan All), StyleCop
If it can help you, I have created a fork of StyleCop from CodePlex. My version works now with VS2015 and support most of new C# 6 specifications. Like version 4.7.49.0, you can right click on your project and you can find "Run StyleCop, Run StyleCop (Rescan All) or Edit settings" menus.
How to install it :
If you have any issue you can report it on GitHub, project name : Visual StyleCop.