Increment train, test, detect runs/ (#1322)

* Increment train, test, detect runs/

* Update ci-testing.yml

* inference/images to data/images

* move images

* runs/exp to runs/train/exp

* update 'results saved to %s' str

.gitignore

@@ -26,8 +26,8 @@
 storage.googleapis.com
 runs/*
 data/*
-!data/samples/zidane.jpg
-!data/samples/bus.jpg
+!data/images/zidane.jpg
+!data/images/bus.jpg
 !data/coco.names
 !data/coco_paper.names
 !data/coco.data