VS: Add Windows Forms Support

Add support to maintain designer functionality for Visual Studio C++
Windows Forms projects.  Also add a test project showing how to use
the CMakeLists.txt file and, when successfully configured, will allow
use of the designer for the included form.

Tests/VSWindowsFormsResx/WindowsFormsResx/Source.cpp

@@ -0,0 +1,4 @@
+int main(int argc, char **argv)
+{
+  return 0;
+}