How to configure Magento 2 to transpile es6

babel.js

'use strict';
var combo  = require('./combo'),
    themes = require('./themes'),
    _      = require('underscore');

var themeOptions = {};

_.each(themes, function(theme, name) {
    if (typeof theme.babelFiles != "undefined") {
        themeOptions[name] = {
            files: combo.babelFiles(name)
        };
    }
});

var babelOptions = {
    options: {
        sourceMap: true,
        presets: ['babel-preset-es2015']
    }
};

/**
 * Compiles JS6 to JS5 and generates necessary files if requested.
 */
module.exports = _.extend(themeOptions, babelOptions);

combo.js

/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */

'use strict';

var theme = require('./themes'),
    path = require('./path'),
    refine_path = function (theme, file_path) {
        return path.pub +
               theme.area + '/' +
               theme.name + '/' +
               theme.locale + '/' + 
               file_path;
    };

/**
 * Define Combos for repetitive code.
 */
module.exports = {
    collector: function (themeName) {
        var cmdPlus = /^win/.test(process.platform) ? ' & ' : ' && ',
            command = 'grunt --force clean:' + themeName + cmdPlus;

        command = command + 'php bin/magento dev:source-theme:deploy ' +
            theme[themeName].files.join(' ') +
            ' --type=less' +
            ' --locale=' + theme[themeName].locale +
            ' --area=' + theme[themeName].area +
            ' --theme=' + theme[themeName].name;

        return command;
    },

    autopath: function (themeName, folder) {
        return folder +
            theme[themeName].area + '/' +
            theme[themeName].name + '/' +
            theme[themeName].locale + '/';
    },

    babelFiles: function (themeName) {
        var es6Files = [],
            ourTheme = theme[themeName],
            files = ourTheme.babelFiles;

        for (var i = 0; i < files.length; i++) {
            if (typeof files[i].src == "undefined") {
                var path_collection = {};
                for (var target in files[i]) {
                    path_collection[refine_path(ourTheme, target)] = refine_path(ourTheme, files[i][target]); 
                }
                es6Files.push(path_collection);
            } else {
                files[i].cwd = refine_path(ourTheme, files[i].cwd);
                files[i].dest = refine_path(ourTheme, files[i].dest);
                es6Files.push(files[i]);
            }
        }

        return es6Files;
    },

    lessFiles: function (themeName) {
        var lessStringArray = [],
            cssStringArray = [],
            lessFiles = {},
            i = 0;

        for (i; i < theme[themeName].files.length; i++) {
            cssStringArray[i] = path.pub +
            theme[themeName].area + '/' +
            theme[themeName].name + '/' +
            theme[themeName].locale + '/' +
            theme[themeName].files[i] + '.css';

            lessStringArray[i] = path.pub +
            theme[themeName].area + '/' +
            theme[themeName].name + '/' +
            theme[themeName].locale + '/' +
            theme[themeName].files[i] + '.less';

            lessFiles[cssStringArray[i]] = lessStringArray[i];
        }

        return lessFiles;
    }
};

themes.js

/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */

'use strict';

/**
 * Define Themes
 *
 * area: area, one of (frontend|adminhtml|doc),
 * name: theme name in format Vendor/theme-name,
 * locale: locale,
 * files: [
 * 'css/styles-m',
 * 'css/styles-l'
 * ],
 * dsl: dynamic stylesheet language (less|sass)
 *
 */
module.exports = {
    blank: {
        area: 'frontend',
        name: 'Magento/blank',
        locale: 'en_US',
        files: [
            'css/styles-m',
            'css/styles-l',
            'css/email',
            'css/email-inline'
        ],
        dsl: 'less'
    },
    luma: {
        area: 'frontend',
        name: 'Magento/luma',
        locale: 'en_US',
        files: [
            'css/styles-m',
            'css/styles-l'
        ],
        dsl: 'less'
    },
    dm2: {
        area: 'frontend',
        name: 'demo-vendor/demo-m2-theme',
        locale: 'en_US',
        babelFiles: [{
            expand: true,
            cwd: 'js/source/',
            src: ['**/*.js'],
            dest: 'js/'
        }],
        files: [
            'css/styles-m',
            'css/styles-l'
        ],
        dsl: 'less'
    },
    backend: {
        area: 'adminhtml',
        name: 'Magento/backend',
        locale: 'en_US',
        files: [
            'css/styles-old',
            'css/styles'
        ],
        dsl: 'less'
    }
};

How does this work when you deploy to production? Do the transpiled files get committed as well?