Merge pull request #256 from EasyPost/docs_link

docs: adds lib docs link to README

Author: Justintime50

README.md

@@ -64,7 +64,9 @@ print(shipment)
 
 ## Documentation
 
-API Documentation can be found at: <https://easypost.com/docs/api>.
+API documentation can be found at: <https://easypost.com/docs/api>.
+
+Library documentation can be found on the web at: <https://easypost.github.io/easypost-python/> or locally in the `docs` directory.
 
 Upgrading major versions of this project? Refer to the [Upgrade Guide](UPGRADE_GUIDE.md).