OpenCV v4.1.0 (janza#32)

Merge branch 'master' into opencv_contrib

Merge branch 'master' into opencv_contrib

Merge pull request janza#26 from dnstanciu/master

Update to 4.0.1

Merge pull request janza#27 from dnstanciu/opencv_contrib

Update to 4.0.1

Merge tag 'opencv-4.0.0'

Merge tag 'opencv-4.0.0' into opencv_contrib

Update to python 3.7 and opencv 3.4.2

Update to python 3.7 and opencv 3.4.2

Merge branch 'master' into opencv_contrib