code: function logMissingPackages(bundle)
  {
      var missing = _(bundle.packages).reject('installed')
          .map('name').uniq().value();
  
      if ( ! missing.length) return;
  
      console.log('')
      console.log(
          colors.black.bgRed('!!! ' + bundle.name + ' is missing ' + colors.bold(missing.length) + ' package(s)')
      );
      _.forEach(missing, function (name) {
          console.log('   - ' + name);
      });
      console.log('   Try running ' + colors.cyan('bower install ' + missing.join(' ')));
      console.log('');
  }
docs: Log to console any packages that were requested but not installed.
  
  @param  {Bundle} bundle