make dtor virtual and move some slots from public to protected
make dtor virtual and move some slots from public to protected

svn path=/trunk/KDE/kdepim/akregator/; revision=438233

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