Add @depends and some bundle descriptions to lib/*/packages.cf.  Add body file control inputs => { paths.cf } to lib/3.6/packages.cf.
Do examples in lib/3.?/packages.cf properly.
Remove paths.cf reference from debian_knowledge @depends
Reorg of lib/3.6/packages.cf: document Redhat package_method bodies; introduce common_knowledge bundle and use it; overwrite all yum attributes with yum_rpm; use yum_rpm attributes in the generic package method.
update/update_bins.cf: add u_common_knowledge and use it.
Merge pull request #1 from tzz/feature/yum_rpm-and-common-knowledge

Reorg of lib/3.6/packages.cf for yum_rpm and common knowledge
update/update_bins.cf: list_update_ifelapsed to list_update_ifelapsed_now for consistency with packages.cf
packages.cf: bring in common_knowledge for ifelapsed and ifelapsed_now.  Factor out Debian patch name and version regex.
packages.cf: use debian_knowledge.call_aptitude everywhere
packages.cf: bring redhat_knowledge to lib/3.5 and use it.  Do not use --quiet for yum grouplist