completely new C++ persistence implementation (#13011)

* integrated the new C++ persistence; removed old persistence; most of OpenCV compiles fine! the tests have not been run yet

* fixed multiple bugs in the new C++ persistence

* fixed raw size of the parsed empty sequences

* [temporarily] excluded obsolete applications traincascade and createsamples from build

* fixed several compiler warnings and multiple test failures

* undo changes in cocoa window rendering (that was fixed in another PR)

* fixed more compile warnings and the remaining test failures (hopefully)

* trying to fix the last little warning

modules/objdetect/src/hog.cpp

@@ -2118,62 +2118,6 @@ void HOGDescriptor::detectMultiScale(InputArray img, std::vector<Rect>& foundLoc
                 padding, scale0, finalThreshold, useMeanshiftGrouping);
 }
 
-template<typename _ClsName> struct RTTIImpl
-{
-public:
-    static int isInstance(const void* ptr)
-    {
-        static _ClsName dummy;
-        static void* dummyp = &dummy;
-        union
-        {
-            const void* p;
-            const void** pp;
-        } a, b;
-        a.p = dummyp;
-        b.p = ptr;
-        return *a.pp == *b.pp;
-    }
-    static void release(void** dbptr)
-    {
-        if(dbptr && *dbptr)
-        {
-            delete (_ClsName*)*dbptr;
-            *dbptr = 0;
-        }
-    }
-    static void* read(CvFileStorage* fs, CvFileNode* n)
-    {
-        FileNode fn(fs, n);
-        _ClsName* obj = new _ClsName;
-        if(obj->read(fn))
-            return obj;
-        delete obj;
-        return 0;
-    }
-
-    static void write(CvFileStorage* _fs, const char* name, const void* ptr, CvAttrList)
-    {
-        if(ptr && _fs)
-        {
-            FileStorage fs(_fs, false);
-            ((const _ClsName*)ptr)->write(fs, String(name));
-        }
-    }
-
-    static void* clone(const void* ptr)
-    {
-        if(!ptr)
-            return 0;
-        return new _ClsName(*(const _ClsName*)ptr);
-    }
-};
-
-typedef RTTIImpl<HOGDescriptor> HOGRTTI;
-
-CvType hog_type( CV_TYPE_NAME_HOG_DESCRIPTOR, HOGRTTI::isInstance,
-    HOGRTTI::release, HOGRTTI::read, HOGRTTI::write, HOGRTTI::clone);
-
 std::vector<float> HOGDescriptor::getDefaultPeopleDetector()
 {
     static const float detector[] = {