javacv-examples v.1.5

• All examples updated to use JavaCPP and corresponding presets v.1.5
• Code corrections needed for changes in OpenCV 4
• Rewrite Flandmark demo to use after CvHaarClassifierCascade was removed from OpenCV 4, using CascadeClassifier instead.

javacv-examples v.1.1

Examples updated to use OpenCV 3 and JavaCV/Presets 1.1.