Convert editor key in .meta/config.json files
Convert editor key in .meta/config.json files

* Convert editor key to files

* Add missing "files" field to .meta/config.json files

* Add exemplar files to .meta/config.json

* Add common-lisp exemplar to template

patricksjackson/xcpp,patricksjackson/xcpp,exercism/xcpp,exercism/xcpp