Completely get rid of opencv_group

doc/conf.py

@@ -311,7 +311,7 @@ extlinks = {
             'feature2d' : ('http://opencv.itseez.com/trunk/modules/imgproc/doc/feature_detection.html#%s', None ),
             'imgproc_geometric' : ('http://opencv.itseez.com/trunk/modules/imgproc/doc/geometric_transformations.html#%s', None ),
 
-            'opencv_group' : ('http://answers.opencv.org/%s', None),
+            # 'opencv_group' : ('http://answers.opencv.org/%s', None),
             'opencv_qa' : ('http://answers.opencv.org/%s', None),
             'how_to_contribute' : ('http://code.opencv.org/projects/opencv/wiki/How_to_contribute/%s', None),
 

doc/tutorials/introduction/windows_install/windows_install.rst

@@ -292,7 +292,7 @@ Building the library
 
    This will create an *Install* directory inside the *Build* one collecting all the built binaries into a single place. Use this only after you built both the *Release* and *Debug* versions.
 
-   To test your build just go into the :file:`Build/bin/Debug` or :file:`Build/bin/Release` directory and start a couple of applications like the *contours.exe*. If they run, you are done. Otherwise, something definitely went awfully wrong. In this case you should contact us via our :opencv_group:`user group <>`.
+   To test your build just go into the :file:`Build/bin/Debug` or :file:`Build/bin/Release` directory and start a couple of applications like the *contours.exe*. If they run, you are done. Otherwise, something definitely went awfully wrong. In this case you should contact us at our :opencv_qa:`Q&A forum <>`.
    If everything is okay the *contours.exe* output should resemble the following image (if built with Qt support):
 
    .. image:: images/WindowsQtContoursOutput.png