adds second variant for detect
remove beaver.png
adds tests for detector with mask
merge detector*t
removes second variant for detector
adds tests for drawKeypoints
adds GridAdaptedFeatureDetector, PyramidAdaptedFeatureDetector
adds Cv::Features2d::FeatureDetector::create to fix GridAdaptedFeatureDetector issue
adds test for PyramidAdaptedFeatureDetector
updates MANIFEST
rewrites opponent, and adds grid