To prevent less experienced users from attempting to install a zip that has many files or folders in the root and it not really an arduino library there are some basic checks made before allowing install.

The zips the url you provided need to have the library folder in the root and no other folders. Unfortunately there is also a  _MACOSX folder in the root.

You can delete the folder from the zip then it will probably work. You could also try using the arduino ide to see if it ignores the folder?

In any case installing a library is simply a matter of copying the library folder from the root of the zip to your "mydocuments\arduino\libraries" folder, Click the Rescan button on the Micro Explorer or restart the Ide after adding a library manually.