include default layout modes for RequireJS

Ref #578

examples/js/require-js.js

@@ -16,22 +16,19 @@ requirejs( [ '../js/isotope', '../js/layout-modes/masonry' ], function( Isotope
 // */
 
 // isotope.pkgd.js
-/*
-requirejs( [  'require', 'js/isotope.pkgd.js' ],
-  function( require, Isotope ) {
-    require( [ 'isotope/js/layout-modes/fit-rows' ], function() {
+// /*
+requirejs( [ 'js/isotope.pkgd.js' ], function( Isotope ) {
   new Isotope( '#basic', {
-        layoutMode: 'fitRows',
+    layoutMode: 'masonry',
     masonry: {
       columnWidth: 60
     }
   });
-    });
-  }
-);
+});
 // */
 
 // isotope.pkgd.js and jQuery
+/*
 requirejs.config({
   paths: {
     jquery: '../../bower_components/jquery/jquery'
@@ -42,7 +39,6 @@ requirejs( [ 'require', 'jquery', 'js/isotope.pkgd.js' ],
   function( require, $, Isotope ) {
     require( [
       'jquery-bridget/jquery.bridget',
-      'isotope/js/layout-modes/masonry'
     ],
     function() {
       $.bridget( 'isotope', Isotope );
@@ -54,3 +50,5 @@ requirejs( [ 'require', 'jquery', 'js/isotope.pkgd.js' ],
     }
   );
 });
+
+// */

js/isotope.js

@@ -585,7 +585,11 @@ if ( typeof define === 'function' && define.amd ) {
       'get-size/get-size',
       'matches-selector/matches-selector',
       './item',
-      './layout-mode'
+      './layout-mode',
+      // include default layout modes
+      './layout-modes/masonry',
+      './layout-modes/fit-rows',
+      './layout-modes/vertical'
     ],
     isotopeDefinition );
 } else {