This is a Device Type
If you click on his Github link in post one I assume this is the most up to date version, It’s dated Sept 5th 2015.
I don’t have any real world experience coding. Everything I know (which isn’t a ton) is self taught. Adding community device types and smart apps is very simple for me.
For a more In Depth Guide see the comunity created Things that are smart wiki article here
In Short:
1.You will need to do this with the developer tools you can find that in the upper right hand corner at community.smartthings.com Edit: This should be done via desktop/laptop not mobile.
2.Click on my device types, Create new from code - copy/paste the code, Save and publish for me.
3.Then go to the my device tab. Click on the fan switch you installed and paired. Click edit. Click type and select the device type you just added. Click update. Changes should push out.
Edit: Also Another better guide than my quick version: FAQ: An Overview of Using Custom Code in SmartThings