NORM_RELATIVE | NORM_INF, NORM_RELATIVE | NORM_L1 and NORM_RELATIVE | NORM_L2
respectively in the documentation for cv::norm and cv::NormTypes

An example program shows using cv::findHomography and cv::warpPerspective for image warping

* Remove "simple" flow estimation from help (because it was disabled by 653bca8b)
* Add `flush` after printing iteration number for better UX

OpenCV 3.3.0

OpenCV 3.3.0

OpenCV 3.3.0 for Intel Computer Vision SDK

- boundary checks
- div by zero guard
- fixed bilinear interpolation (another case)
- reduce memory allocation

- OpenCL kernels don't handle matrices properly. Assumptions are not checked.
- OpenCL/T-API integration is not correct.