removed trailing backspaces, reduced number of warnings (under MSVC2010 x64) for size_t to int conversion, added handling of samples launch without parameters (should not have abnormal termination if there was no paramaters supplied)

update help corresponding single format and update some samples through using CommandLineParser class

modified features2d interface; added algorithmic test for DescriptorMatcher; added sample on matching to many images

modified FernClassifier::train(); remove old RTreeClassifier and added new implementation CalonderClassifier; removed old find_obj_calonder and added new one