Updated README

Author: jolinos

README.mkdn

@@ -10,7 +10,11 @@ Version: 2.2.10
 
 The latest version of the wrapper can be downloaded [here](https://github.com/plotly/MATLAB-Online/archive/master.zip).
 
-Once downloaded, run `plotlysetup('your_username', 'your_api_key')` to get started.
+Once downloaded, run `plotlysetup_offline()` to get started
+If you have a plotly bundle url of the form 'http://cdn.plot.ly/plotly-latest.min.js', then run instead
+`plotlysetup_offline('plotly_bundle_url')
+
+For online use, run `plotlysetup_online('your_username', 'your_api_key')` to get started.
 
 ### Updates