Added Smoothing tutorial in reST and links to the code in samples/cpp/tutorial_code

samples/cpp/Qt_sample/main.cpp

@@ -6,7 +6,7 @@
 #include <vector>
 
 #include <opencv/highgui.h>
-#include <gl/GL.h>
+#include <GL/gl.h>
 #include <opencv/cxcore.h>
 #include <opencv/cv.h>
 using namespace std;

samples/cpp/tutorial_code/Image_Processing/Smoothing.cpp

@@ -1,5 +1,5 @@
 /**
- * file FilterDemo1.cpp
+ * file Smoothing.cpp
  * brief Sample code for simple filters
  * author OpenCV team
  */
@@ -19,7 +19,7 @@ int DELAY_BLUR = 100;
 int MAX_KERNEL_LENGTH = 31;
 
 Mat src; Mat dst;
-char window_name[] = "Filter Demo 1";
+char window_name[] = "Smoothing Demo";
 
 /// Function headers
 int display_caption( char* caption );