code: function (module_name, module_folder) {
      var module_path = path.resolve(module_folder);
  
      // load current keystore
      let keystored = {};
      const filename = ".iotdb/keystore.json";
      _.cfg.load.json([ filename ], docd => keystored = _.d.compose.deep(keystored, docd.doc));
  
      // change it
      _.d.set(keystored, "/modules/" + module_name, module_path)
  
      // save it
      fs.writeFile(filename, JSON.stringify(keystored, null, 2));
  
      console.log("- installed homestar module!");
      console.log("  name:", module_name);
      console.log("  path:", module_path);
  }
docs: Add module info to the keystore