* Fixed external pages 
* Check for XSLT extension
* Fixed warnings (STRICT, deprecated)

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/branches/4.0@881948 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Updated version

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/branches/4.0@881950 b8457f37-d9ea-0310-8a92-e5e31aec5664