Merge pull request #25 from umr-lops/fix_versioning

add example for S3 protocol in readme and fix version of the lib

README.md

@@ -152,4 +152,11 @@ DataTree('None', parent=None)
 
 ```
 
+Example of usage for S3: access
 
+```pycon
+url = 's3:///eodata/..../.SAFE'
+storage_options = {"anon": False, "client_kwargs": {"endpoint_url": 'https://'+entrypoint_url, 'aws_access_key_id':access_key,
+    'aws_secret_access_key':secret_key}}
+reader = Sentinel1Reader(url,backend_kwargs={"storage_options": storage_options})
+```

safe_s1/__init__.py

@@ -1,7 +1,12 @@
-from importlib.metadata import version
-from .metadata import Sentinel1Reader
-
+import traceback
+#import safe_s1
+from safe_s1.reader import Sentinel1Reader
 try:
-    __version__ = version("safe_s1")
+    from importlib import metadata
+except ImportError: # for Python<3.8
+    import importlib_metadata as metadata
+try: 
+    __version__ = metadata.version("xarray-safe-s1")
 except Exception:
+    print('trace',traceback.format_exc())
     __version__ = "999"