Initial Windows RT support commit.

GPU module turned off;
TIFF support turned off;
Windows Managment and Video IO (VFW) turned off.

modules/highgui/src/cap.cpp

@@ -197,9 +197,10 @@ CV_IMPL CvCapture * cvCreateCameraCapture (int index)
         {
 #ifdef HAVE_VIDEOINPUT
         case CV_CAP_DSHOW:
-            capture = cvCreateCameraCapture_DShow (index);
-            if (capture)
-                return capture;
+            // capture = cvCreateCameraCapture_DShow (index);
+            // if (capture)
+            //     return capture;
+            return NULL;
             break;
 #endif