Add XML schema for KDE features file.
Add XML schema for KDE features file.

svn path=/trunk/KDE/kdepim/; revision=508809

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi