ml_svm_tutorials version note added

Added note to point out code is for version 3.0 despite compatibility of
tutorial > version 2.0

doc/tutorials/ml/introduction_to_svm/introduction_to_svm.markdown

@@ -94,6 +94,8 @@ the weight vector \f$\beta\f$ and the bias \f$\beta_{0}\f$ of the optimal hyperp
 Source Code
 -----------
 
+@note The following code has been implemented with OpenCV 3.0 classes and functions. An equivalent version of the code using OpenCV 2.4 can be found in [this page.](http://docs.opencv.org/doc/tutorials/ml/introduction_to_svm/introduction_to_svm.html#introductiontosvms)
+
 @include cpp/tutorial_code/ml/introduction_to_svm/introduction_to_svm.cpp
 
 Explanation