* added option to not open on save

* Update detect.py
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

* Fix increment_dir to use run_xxx for logdir 

Rerunning train.py with logdir in the form of `run_xxx` causes index slicing in
```
n = max([int(x[len(dir):x.find('_') if '_' in Path(x).name else None]) for x in d]) + 1  # increment
```
to underflow.

* Replace find with rfind

* Update ci-testing.yml

* Update yolo.py

* Update ci-testing.yml

* Update export.py

* Update yolo.py

fix a bug in load_mosaic

* add the configuration to deploy yolov5 in a docker container in app engine on google cloud

* remove the duplicated requirements, place the google app engine files in utils

* remove the unused requirements
Co-authored-by: guilhembau <guilhem@6dbytes.com>

* feat: add rtmp support

* Update detect.py

pass tuple to source.startswith()
Co-authored-by: ryan.fu <ryan.fu@aylaasia.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>