C++/CLI expression evaluator

Note: this VSIX is only for  VS2015 Update 2. Our current recommendation is to install Update 3 with KB3165756 and uninstall this VSIX if you already have it.   Update 3 supports the new EE by default.

Since the major debugger engine overhaul in Visual Studio 2012, the debugging experience for C++/CLI has lagged behind that of either native or managed C# debugging, and lacked the ability to properly visualize native data structures in the code.  For Visual Studio 2015 Update 2, we have rewritten the C++/CLI  expression evaluator so that it now supports all of the new debugger features added since VS2012, including the Natvis debugger visualization framework with in-box support for the STL containers.  

Instructions:

1. Install Visual Studio 2015 Update 2 RTM: http://go.microsoft.com/fwlink/?LinkId=691129
2. Install KB3151378: https://msdn.microsoft.com/en-us/library/mt695655.aspx
3. Install this .vsix to enable the new C++/CLI expression evaluator.