Download the zip file https://github.com/iancmcc/ouimeaux , uncompress it and put it in your SD card. Then enter the Galileo command line and open the folder ouimeaux-master, by typing this command:
Then if you use the ls command you should see all the content, including the setup.py file this is the installer of the module. To install it you just need to type:
python setup.py install
Let me know if this worked for you.