Download add-ons from console? When I download add-ons from this page, sometimes I get a zip file, but sometimes it's just a link like this. 

I don't have programmer training, but I know that's something to do with calling an action from the console. Before I just copied the text into a text file, saved it as a zip and installed it that way, but what's the actual way to get the add-on from a link like that?

I saw this: How can I get a list of the installed addons using the API? but it doesnt help me.
You can use wget which is a command line tool to retrieve files using HTTP, HTTPS and FTP you can download it from here and these are the installation instructions and how to use 

Also rather than coping it to a text file you could have right clicked on each of the six files and clicked 'save link as....' (a easier way) after that just put all of them in a folder and put that folder in the add-on folder