* Changed content type to text/xml to improve compatibility with caching plugins
* Changed query parameters to is_feed=true to improve compatibility with caching plugins
* Switched from using WP_Query to load posts to a custom SQL to avoid problems with other plugin filters
* Fixed bug which caused the Priority Provider to disappear in recent PHP versions
* Cleaned up code and renamed variables to be more readable

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@901846 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Updated version number

git-svn-id: https://plugins.svn.wordpress.org/google-sitemap-generator/trunk@901847 b8457f37-d9ea-0310-8a92-e5e31aec5664