Introduce a new categoryNames() function for fetching all of the categories from an appinfo block.
Introduce a new categoryNames() function for fetching all of the categories from an appinfo block.

svn path=/branches/KDE/3.5/kdepim/; revision=612569

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