Merge pull request #94 from jhoblitt/symbolic_names

allow concat::fragment target param to be an arbitrary string
Merge pull request #93 from jhoblitt/tidyups

Tidyups
Merge pull request #91 from jhoblitt/exec_as_root_when_root

always exec the concatfragments script as root when running as root
deprecate concat::fragment mode, owner, & group params

There's no need to allow the ownership/permissions of a fragment to be set as
the concat define sets ownership/permissions on the final aggregated file.