Added footer support. Fixed breadcrumb generator to support acquisition and security at the same time. Added configuration options to default them. Made CSS parametric. Made all widgets generic (based on caching of web page accessed through reference as in Yuna KM).

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21109 20353a03-c40f-0410-a6d1-a30d3c3de9de