Allow train to use zipped content (ultralytics#8940)

* fix: added transparent image and empty alt to social bar

* fix: remove underlines

* fix: hide underlines for all social links

* fix: always unzip into folder

utils/general.py

@@ -480,7 +480,7 @@ def check_dataset(data, autodownload=True):
     # Download (optional)
     extract_dir = ''
     if isinstance(data, (str, Path)) and str(data).endswith('.zip'):  # i.e. gs://bucket/dir/coco128.zip
-        download(data, dir=DATASETS_DIR, unzip=True, delete=False, curl=False, threads=1)
+        download(data, dir=f'{DATASETS_DIR}/{Path(data).stem}', unzip=True, delete=False, curl=False, threads=1)
         data = next((DATASETS_DIR / Path(data).stem).rglob('*.yaml'))
         extract_dir, autodownload = data.parent, False