fix up yum module for rhel5.

is not there at all or even updateable

if installed and updated available: apply update
if not installed and available: install

This relies on groupadd, groupmod, groupdel, and gpasswd utilities on
the system.  You can optionally modify the gid for the group.  You can
also add/remove a user to/from a group with the option member.  Member
state is defined with the option memberstate.

This changes the gid option to group.  One may provide a primary group
as either a gid or a name.  The module will then check to verify that
the group already exists.  If the group does not already exist, the
module will fail.

is not there at all or even updateable

if installed and updated available: apply update
if not installed and available: install

Catch jinja errors in template module

apt module

Playbook: create one task per include instead of per argument.

Applying callback model to runner, and using that in playbooks, so output can be more immediate in playbooks.

(Runner still does not use callbacks for default output)