Added 'Num of tests' col, changed headers, added 'overall time' row
Switched time from seconds to minutes
changed diagnostic from "warning" to "note" in the python wrapper generator, to suppress some noise in opencv utilities
Merge pull request #314 from vpisarev:2.4
Merge pull request #306 from AnnaKogan8:perf_tests_timing.py-improvement
check of keypoint index range in drawMatches
Merge pull request #316 from mdim:draw_matches_fix