Add a file with debug visualizers for MSVS 2013 and later.

For now this file contains just the visualizer for wxWindow which shows its
real (most derived) type as this is often the most useful thing you need to
know about the window.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76701 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add MSVS visualizers for wxArrayString, wxVector, wxWindowList.

Make viewing the contents of the (most common) container types easier when
debugging in MSVS 2012 or later.

Provide std::{vector,list}-like visualizers for wxVector and wxWindowList and
a special visualizer allowing to see the contents of wxArrayString in a
relatively common case when it has just or two elements.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76702 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775