v0.6.0

• core
  • Add cv::LUT binding
• examples
  • do not try to go fullscreen, since does not work on OSX
• features2d
  • add AKAZE algorithm
  • add BRISK algorithm
  • add FastFeatureDetector algorithm
  • implement AgastFeatureDetector algorithm
  • implement ORB algorithm
  • implement SimpleBlobDetector algorithm
• osx
  • Fix to get the OpenCV path with "brew info".
• highgui
  • use new Window with thread lock, and deprecate WaitKey() in favor of Window.WaitKey()
  • use Window.WaitKey() in tests
• imgproc
  • add tests for HoughCircles
• pvl
  • use correct Ptr referencing
• video
  • use smart Ptr for Algorithms thanks to @alalek
  • use unsafe.Pointer for Algorithm
  • move tests to single file now that they all pass