implement removal of entries

Signed-off-by: Mattias Andrée <maandree@operamail.com>
m

Signed-off-by: Mattias Andrée <maandree@operamail.com>
use shared lock when opening a feed

Signed-off-by: Mattias Andrée <maandree@operamail.com>
it is now possible to modify titles of feed entries

Signed-off-by: Mattias Andrée <maandree@operamail.com>