add see-also links

README.md

@@ -92,6 +92,12 @@ pip3 install --user -e './meanas[test,examples]'
 python3 -m pytest
 ```
 
+### See also:
+- [git book](https://git-scm.com/book/en/v2)
+- [virtualenv documentation](https://virtualenv.pypa.io/en/stable/userguide/)
+- [python language reference](https://docs.python.org/3/reference/index.html)
+- [python standard library](https://docs.python.org/3/library/index.html)
+
 
 ## Use