Implements Name tags (#186)
* implement NamedTags for loopy target
* tests name tags for loopy target
* Remove stray whitespace
Co-authored-by: Andreas Klöckner <inform@tiker.net>
* implement NamedTags for loopy target
* tests name tags for loopy target
* Remove stray whitespace
Co-authored-by: Andreas Klöckner <inform@tiker.net>