code: function normalizeOpts(obj, basedir, pkg) {
      obj = obj || {};
  
      u.each(OPTSKEYS, function(key) {
        obj[key] = normalizeOptsKey(obj[key], basedir, pkg);
      });
  
      normalizeFqImages(obj);
  
      return obj;
    }
docs: mutate opts obj by normalizing Key values into form [ { path:x },... ] qualify relative paths against basedir