* add cv::compare test when Mat type == CV_16F

* add assertion in cv::compare when src.depth() == CV_16F

* cv::compare assertion minor fix

* core: add more checks

* enable tests for DNN_TARGET_CUDA_FP16

* disable deconvolution tests

* disable shortcut tests

* fix typos and some minor changes

* dnn(test): skip CUDA FP16 test too (run_pool_max)

* doc: added macOS installation guide

* doc: added clarification and corrections

* docs: introduction entry, lowercase file names and ids

* imgproc(test): resize(LANCZOS4) reproducer 16192

* imgproc: fix resize LANCZOS4 coefficients generation

* cuda_mog2_issue_5296

* Fix #16007 - colinearity computed using all 3 coordinates

* calib3d(test): estimateAffine3D regression 16007

* Handle det == 0 in findCircle3pts.

Issue 16051 shows a case where findCircle3pts returns NaN for the
center coordinates and radius due to dividing by a determinant of 0. In
this case, the points are colinear, so the longest distance between any
2 points is the diameter of the minimum enclosing circle.

* imgproc(test): update test checks for minEnclosingCircle()

* imgproc: fix handling of special cases in minEnclosingCircle()

modern readers that expect RADIANCE will read it

G-API: Tutorial: Face beautification algorithm implementation

* Introduce a tutorial on face beautification algorithm

- small typo issue in render_ocv.cpp

* Addressing comments rgarnov smirnov-alexey