README: update info on original project
README: update info on original project

fixes #30
lazywei/go-opencv,lazywei/go-opencv,ronoaldo/go-opencv,qwantix/go-opencv,go-opencv/go-opencv,roth1002/go-opencv,go-opencv/go-opencv,roth1002/go-opencv,ronoaldo/go-opencv,tonycoming/go-opencv-1,tonycoming/go-opencv-1,tonycoming/go-opencv-1,qwantix/go-opencv,lazywei/go-opencv,qwantix/go-opencv,roth1002/go-opencv,go-opencv/go-opencv,ronoaldo/go-opencv