How To Extract Bootstrap's Popover Functionality?

How To Extract Bootstrap's Popover Functionality?

I have a non-bootstrap project which requires popover functionality.
I'd like to use bootstrap's popovers, but don't want to include all of
bootstrap, since I'll only be using this one feature. I'd also be open to
suggestions for a different standalone popover widget.
Bootstrap's popover are described here, with examples:
http://getbootstrap.com/javascript/#popovers
My questions are:
Which bootstrap CSS definitions will I need to extract from the source?
Since the bootstrap customizer is not yet available, do I just need to use
the file tooltip.js, or are there some other base js files I'll need to
include?
Thanks!