WP Meta SEO Pro - Der WordPress SEO-Freundliche Plugin von Joomunited 1.5.4

* Add : A filter hook to support custom taxonomies in the sitemap
* Fix : Sitemap pagination in the admin panel

* Fix : Failed to load the sitemap wpms-sitemap.xml

Fix : Automatically disable the free WP Meta SEO plugin to avoid conflict

* Add : Merged the free versions of WP Meta SEO into the WP Meta SEO Pro
* Add : Redesigned the plugin interface

* Fix : Some PHP warnings