Added sanity data for cvtColorBayer8u test
updated data for SURF regression tests
updated nonfree/surf data for the sanity check mode in the performance tests
Merge branch vpisarev:surf_fixes
Merge branch '2.4'
Merge branch AnnaKogan8/fixed-perf-tests into 2.4
added haarcascade_frontalface_default.xml
Merge vpisarev/facedetect_fixes into 2.4
Merge branch '2.4'