On step 2 of the plugin docs, it says to install that package on your salesforce account, but when I click that link, I get this message:

"This app can't be installed.
There are problems that prevent this package from being installed.
Package Not Found  The requested package doesn't yet exist or has been deleted. If this is a recently created package version, please try again in a few minutes or contact the package publisher."

I'm using a developer salesforce account for testing.