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/introduction/display_image/display_image.cpp

@@ -22,7 +22,7 @@ int main( int argc, char** argv )
         return -1;
     }
 
-    namedWindow( "Display window", CV_WINDOW_AUTOSIZE );// Create a window for display.
+    namedWindow( "Display window", WINDOW_AUTOSIZE );// Create a window for display.
     imshow( "Display window", image );                   // Show our image inside it.
 
     waitKey(0);											 // Wait for a keystroke in the window