Merge pull request #23 from ericf/browserify-es3

Make Browserify bundle work in ES3 environments

index.js

@@ -2,7 +2,7 @@
 
 'use strict';
 
-var IntlRelativeFormat = require('./lib/main').default;
+var IntlRelativeFormat = require('./lib/main')['default'];
 
 // Add all locale data to `IntlRelativeFormat`. This module will be ignored when
 // bundling for the browser with Browserify/Webpack.
@@ -12,4 +12,4 @@ require('./lib/locales');
 // locale data registered, and with English set as the default locale. Define
 // the `default` prop for use with other compiled ES6 Modules.
 exports = module.exports = IntlRelativeFormat;
-Object.defineProperty(exports, 'default', {value: exports});
+exports['default'] = exports;