Added URLDecoder to mirror our optimized implementation of URLEncoder - based on optimized/modified JDK and W3 Consortium source code.
urlEncode() and urlDecode() methods added to server-side JavaScript 'stringUtils' object.
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@10498 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261