modified highgui and ts modules and cmakelists for ios cross-compiling, added ios toolchains, added ios build tutorial

modules/highgui/src/grfmt_imageio.hpp

@@ -12,8 +12,19 @@
 #ifdef HAVE_IMAGEIO
 
 #include "grfmt_base.hpp"
+#include <TargetConditionals.h>
+
+#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
+
+#include <MobileCoreServices/MobileCoreServices.h> 
+#include <ImageIO/ImageIO.h>
+
+#else
+
 #include <ApplicationServices/ApplicationServices.h>
 
+#endif
+
 namespace cv
 {