Update to latest AMD spec

Author: kriszyp

lib/links.js

@@ -3,8 +3,8 @@
  * Copyright (c) 2007 Kris Zyp SitePen (www.sitepen.com)
  * Licensed under the MIT (MIT-LICENSE.txt) license.
  */
-require.def||(require.def=function(deps, factory){module.exports = factory();});
-require.def([], function(){
+define||(define=function(deps, factory){module.exports = factory();});
+define([], function(){
 var exports = {};
 exports.cacheLinks = true;
 exports.getLink = function(relation, instance, schema){

lib/validate.js

@@ -13,8 +13,8 @@ empty list will be returned. A validation error will have two properties:
 "property" which indicates which property had the error
 "message" which indicates what the error was
  */
-require.def||(require.def=function(deps, factory){module.exports = factory();});
-require.def([], function(){
+define||(define=function(deps, factory){module.exports = factory();});
+define([], function(){
 var exports = validate;
 // setup primitive classes to be JSON Schema types
 String.type = "string";