When Akonadi::KCalMimeTypeVisitor got moved to kdepimlibs during the kdepim/runtime split, it was moved to kdepimlibs/kcal. However this is the kcal base library, Akonadi specific classes go to kdepimlibs/akonadi/$type_specific_library in this case akonadi/kcal (creating type specific library libakonadi-kcal)
svn path=/trunk/KDE/kdepimlibs/; revision=1069015