updates Changes
fixed MANIFEST
Merge branch 'basil'

Conflicts:
	Changes
	lib/Cv/Features2d.pm
	lib/Cv/Features2d/DescriptorExtractor.pm
	lib/Cv/Features2d/DescriptorMatcher.pm
	lib/Cv/Features2d/Feature2D.pm
	lib/Cv/Features2d/FeatureDetector.pm
fixes compute for Feature2D
adds BRIEF
fixes typo
adds test