I think we should provide the basic styles and the css animations in two separate less files, and let the user decide which styles they want to use. We could even provide multiple animation styles this way, if we wanted to.

The important thing is to separate the presentation from the functionality, and not lock the user into a particular functionality. If we want to provide the Jquery animations as an option, it'd be cleanest if we could do it via a mixin, or some other way to keep the code a bit more separated.

Is this something that can wait for a future pull, once you get Less and Bower involved?