Update README.md

Author: axl1313

README.md

@@ -1,2 +1,9 @@
-# alpha-python
-The unofficial Python library for the Alpha API
+# Alpha Python API library
+
+# Installation
+
+You can install the Alpha python client from [our internal repo](https://github.com/cleanlab/alpha-python) with:
+
+```python
+pip install git+ssh://git@github.com/cleanlab/alpha-python.git
+```