Install Go and then the Go present tool:
go get golang.org/x/tools/cmd/present
Make sure $GOPATH/bin is added to your PATH environment variable.
Open a command prompt in the directory where the repository has been checked out and launch the present tool:
cd [checkout folder for this repository]
present
Open a browser at the specified address and choose the slide file. Normally:
http://127.0.0.1:3999
The source code is linked to into the slides and resides in the subfolders.