Hi,
You can do like what DWF suggested.
Alternatively...wait, let's first understand why the zip things fails. Github disabled downloading zip files in its server for some security reasons. This is why your downloading of the zip file fails. Try checking the size of the zip file that you tried to download ;)
Now what is the solution? Feel free to checkout the entire jasminejs project in your local disk. And then go to the directory where the zip files are located and copy-paste. At least that is what I did.
Happy coding!
Karthik