Save bmp images of inference results to /tmp as bmp files. BMP was
chosen to reduce encoding time. Saving is fully threaded. It can be
enable with qmake CONFIG+=save_images option
Also:
- use antialised fonts in RKNN inference
- moved class strings to inference base class
- fixed silly segfault in ONNX inference
- prevent writing results if class if exceeds valid values
Issue: https://denyspopov.atlassian.net/browse/AZ-38
Type: Improvement
Tuomas Järvinen