README.md: document new argument of setup_orekit_curdir to load from library

Added in orekit-labs/python-wrapper!5

README.md

@@ -52,7 +52,14 @@ pip install git+https://gitlab.orekit.org/orekit/orekit-data.git
 
 This will install a Python library named `orekitdata`. The Python library receives a new version tag at every commit in this repository so that your Python project can pull the newest version of the orekit data every time this repository is updated. The 7 last characters of the version tag correspond to the 7 first characters of the git hash of the commit: for instance the Python version `orekitdata-0+untagged.70.g91b2c79` correspond to the commit of the `master` branch of this repository with a githash starting with `91b2c79`.
 
-Then to pass the data folder to Orekit in Python:
+Then to pass the data folder to Orekit in Python, a new argument `from_pip_library` was added to the `setup_orekit_curdir` method:
+
+```python
+from orekit.pyhelpers import setup_orekit_curdir
+setup_orekit_curdir(from_pip_library=True)
+```
+
+Or optionally, pass the path to the `orekitdata` library to the `filename` argument:
 
 ```python
 import orekitdata