Applied all fixes related to translating C to C++ code

Also fixed some typos and code alignment
Also adapted tutorial CPP samples
Fixed some identation problems

samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp

@@ -71,7 +71,7 @@ int main( int, char** argv )
   }
 
   /// Display
-  namedWindow("calcHist Demo", CV_WINDOW_AUTOSIZE );
+  namedWindow("calcHist Demo", WINDOW_AUTOSIZE );
   imshow("calcHist Demo", histImage );
 
   waitKey(0);