message: Added a couple of comments to the interface of traincascade.cpp in order to tell user about the usage of traincascade.cpp file and to learn how Github submitting works
diff: using namespace std;
  using namespace cv;
  +/*
  +traincascade.cpp is the source file of the program used for cascade training.
  +User has to provide training input in form of posotive and negative training images,
  +and other data related to training in form of command line argument.
  +*/
  int main( int argc, char* argv[] )
  {
  CvCascadeClassifier classifier;
  