There are a lot of add-ons in Plone for sliders/banners/teasers.
We thought there should be a better one and created collective.behavior.banner.
To use it add the name to your list of eggs in buildout.cfg:
eggs= Plone ... collective.behavior.banner
Even though collective.behavior.banner has been released on pypi we’ll now will act as if this addon exists on github only - or alternatively has changes on github that have not been released yet but you that you really want. This is not to annoy you - it happens surprisingly often if you work with new versions of Plone.
The training buildout has a section [sources] that tells buildout to download a specific add-on not from PyPI
but from some code repository (usually GitHub):